With this information

Galvanized for reduced corrosion

Black All Steel Heavy-Duty Frame

but also helps contain pets and increase security

Adjustable Sealed Roller Bearing Hinge - Aluminum with Steel Yoke 2-1//2" x 2-1/2" With this informationLiftMaster Adjustable Sealed Roller Bearing Hinge Aluminum with Steel Yoke Fits Flat or Round Post, Flat Gate Adjustable Yoke provides up to . 5 inch of adjustability Three Maintenance Free Sealed Roller Bearings no greasing required Versatile Fits Flat or Round Post Installation Corrosion Protected Zinc Specifications: Maximum Gate Weight: Up to 2,000 lbs. per pair. Sold in pairs. Pair (2 per Box) 4. 0 lbs. 1. 8 kgs.