Chamberlain Garage Door Opener 8 ft Belt Rail Extension Kit Air Compressor Accessories Constructed of a lightweight aluminum Constructed of a lightweight aluminum alloy Item Weight 2 Material Solid Brass Lock Type Unkeyed Security ANSI Grade ANSI Grade 1 (Best) Hardware Finish Family Bronze Minimum door thickness (in all necessary hardware and instructions for a quick and easy installation is included in the kit Warranty 1 year limited Assembly Required N A Works with Apple HomeKit No Works with MyQ No Works with SkylinkNet No CA Residents: Prop 65 Warning(s) Yes Wi Fi Compatibility No Bluetooth Compatibility No Brand Model Compatibility Chamberlain UNSPSC 30172100 The belt drive rail extension kit for 8 ft high garage doors is required for reliable