Solid Brass Ball-Bearing Hinge Size (H x W):4" x 4" The post measures 1-3/4" and

The post measures 1-3/4" and the screw is 1-1/2" long

no greasing required/

This hinge is made for gates with a curved or arched top

Raw alumimum finish

Solid Brass Ball-Bearing Hinge Size (H x W):4" x 4" The post measures 1-3/4" andBall bearing hinges are recommended for heavier doors, doors over 2" thick, doors over 40" wide, or doors which use a door closer. Permanently lubricated ball bearings. Solid brass base material, stainless steel pin. Note: These solid brass ball bearing hinges contain ball bearings and the bearing raceway that will eventually rust if subjected to harsh weather conditions (especially marine weather and salt air conditions).