We consider a 3 inch square post cap to be a worthy investment in the long run. We are here to help you pick the best one for your needs from all the best available products in market today.

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Our Top Picks:

Best Overall: Buy: Decorex Hardware 3 Inch Square Post Cap READ REVIEW

Best For Pressure Fit: Buy: Decorex Hardware Post Cap READ REVIEW

Best For Stainless Steel: Buy: Bobco Metals 3 Inch Square Post Cap READ REVIEW

Best For Good Quality: Buy: Atlanta Post Caps 3 Inch Square Post Cap READ REVIEW

Best For Heavy Duty: Buy: Luna&Muni 3 Inch Square Post Cap READ REVIEW

Best With Hole: Buy: Bobco Metals 3 Inch Square Post Cap READ REVIEW

Best For Inner Diameter: Buy: Plum Fittings 3 Inch Square Post Cap READ REVIEW

Best Overall: Decorex Hardware 3 Inch Square Post Cap

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The Decorex Hardware 3 Inch Square Post Cap is long-lasting, rigid and fits well with your daily usage like a dream. The decorex hardware 3 inch square post cap fits perfectly, it is decorative and has a decorative pyramid design. The Manufacturer says: Our original shipping cost and 15% restocking fee will be deducted from the refund total if the wrong size post caps are ordered. This model of post cap can also be attached to wooden posts using glue, silicone or other construction adhesives.

The cap is solid, is made for good value and it is great for top quality. Finally, the decorex hardware 3 inch square post cap is flat, is really nice and it is great for pressure fit.

Most customers quickly discovered that the cap is a perfect fit, plus it will last a long time. Also, they also found that the cap fitted true 4x4 steel post perfectly. Without any doubt, this cap passed the test and had very satisfied buyers eager to share their experience.

• This fits perfectly as well and has a good design.
• It looks great and has a solid design.
• This matched perfectly and it was worth the money.
• This is designed for perfect match, It works great and is designed for wooden posts.

Best For Pressure Fit: Decorex Hardware Post Cap

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Not everyone likes to purchase a cap for their daily purpose, but the Decorex Hardware Post Cap would be an anomoly. The decorex hardware post cap is designed for outdoor use. Decorex hardware 3" x 3" aluminium pyramid post caps are a perfect choice that will make your fence stylish and beautiful, providing long-lasting protection to your posts against weather conditions, adding many years of life to your fence and overall value to your home. This model of post cap can also be attached to wooden posts using glue, silicone or other construction adhesives.

The cap is decorative and it is affordable. In addition, it fits perfectly, is fit perfect, it fits great and has a clean design. Most importantly, the decorex hardware post cap is made for a great finish and it is very nice.

Almost all buyers quickly discovered that the cap fits 3" aluminum fence posts perfectly. And, they strongly agree that the cap is perfect without even needing adhesive, and looks neat and clean all the time. To sum up, buyers found this to be one of the best cap for daily purposes.

• This is perfect and looks like the original.
• Made of high quality cast aluminium. Thickness of around 1/8".
• This allows for easy installation and it is replaced old.
• This is a perfect intem well made correct measurements.

Best For Stainless Steel: Bobco Metals 3 Inch Square Post Cap

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The Bobco metal 3 inch square post cap's material feels more premium than its price would suggest. The Bobco metal 3 inch square post cap is ornamental and it is decorative. Manufacturer says: We manufacture steel tube, corrugated sheets, b deck, slotted angles, pbr panels, and corner guards. These items don't have a screw hole.

The cap fits perfectly, is ideal for heavy duty and it is perfect for stainless steel. Above all, the Bobco metal 3 inchsquare post cap is industrial as well.

Most buyers found that the cap fit snugly on the square post and painted up beautifully. And, they strongly agree that the caps are exactly as stated in the dimensions. Overall, for almost all customers, Bobco Metals product was what they were looking for.

• These are usually painted with waterproof paint for rust protection.
• This provides extended longevity in even the most challenging environment.
• This is more, is very nice and it provides great value.
• It is also easy to install.

Best For Good Quality: Atlanta Post Caps 3 Inch Square Post Cap

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Next on the list, we've got yet another cap that manages to win our hearts. It's the Atlanta postcap 3 inch squarepost cap and it's widely considered as the cap that has the most suitable features. The Atlanta post cap 3inch square post cap can be trusted for good quality, fits perfectly and it fits perfectly. The manufacturer says: We recommend not snapping the caps together until you are ready to install them. In addition, it looks good, fits perfectly and it has a good snug fit.

The cap offers substantial improvements over plain wood. Finally, the Atlanta post cap 3 inch square post cap is the only patented postcap on the market and is proudly manufactured in the United States.

Consequently, customers were eager to recommend it to friends and would-be buyers.

• Simply press and the cap will 'snap' firmly into place.
• Manufacturer says: We highly suggest using anti-rust screws to ensure a lasting, no-hassle attachment.
• This can be used on automobiles and marine vehicles.
• If you’re unsure, always measure to double check.

Best For Heavy Duty: Luna&Muni 3 Inch Square Post Cap

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The Luna&Muni 3 Inch Square Post Cap's material feels more premium than its price would suggest. Further, these caps are for use with square steel fences or railing posts. These square post caps are made to be the best for your fence posts. Above all, the luna&muni 3 inchsquare post cap is built for heavy duty and it is decorative.

• Post cap pressed dome steel metal square for gate fences.
• Good brand reputation.

Best With Hole: Bobco Metals 3 Inch Square Post Cap

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We know from years of feedback from readers, amazon sellers, and family and friends what most people want in a convenient and appropriate cap. The Bobco metal 3inch squarepost cap is exactly that - it's a simple cap that hits all the right notes. The Bobco metal 3 inch square post cap is a family owned metal service center, fence hardware, manufacturing, and leveling line company. Make sure this fits by entering your model number. These items don't have a screw hole.

The cap is also easy to install. Also, it is ornamental. Lastly, the Bobco metal 3 inch square post cap provides extended longevity in even the most challenging environment.

• These are usually painted with waterproof paint for rust protection.
• The Manufacturer says: ensuring we continue Bob's vision as a quality one-stop-shop brings us satisfaction.
• These steel caps don't need any hardware tools to be installed.
• This is decorative and it is best for stainless steel.

Best For Inner Diameter: Plum Fittings 3 Inch Square Post Cap

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The Plum Fittings 3 Inch Square Post Cap is suitable and reliable and fits well with your regular use. In addition, it is made from high-quality and durable pressed steel that has been galvanized to prevent rusting. Simply slide the caps on to your desired posts and tap securely into place with a rubber mallet. Lastly, the plum fittings 3 inch square post cap is designed to fit externally on a 3" x 3" square post, has an inner diameter of 3 1/8.

• Pack size: 10 pressed steel post caps.
• Good investment for the long term.