Doorking 1201-105 UHMW V-Wheel Assembly (4") pulley The LiftMaster K75-19977 Arm Kit

The LiftMaster K75-19977 Arm Kit is a complete OEM replacement assembly engineered for commercial slide gates and jackshaft door operators

Restores smooth chain drive function for reliable gate operation

The K74-34392 Antenna ensures optimal wireless communication and dependable remote response for LiftMaster LA412 solar gate systems

Units Per Box: Sold in pairs (2 hinges per box)

Frequency: Works on 315 MHz and 390 MHz

Doorking 1201-105 UHMW V-Wheel Assembly (4") pulley The LiftMaster K75-19977 Arm KitSealed UHMW V Wheel Assembly for Mid Weight Slide Gates The Doorking 1201 105 is a 4 inch ultra high molecular weight (UHMW) V wheel assembly designed for slide gates up to 750 lbs. Equipped with sealed roller bearings, this assembly offers quiet, low maintenance performance in environments where weather resistance and reliability are critical. It mounts directly to a standard 2" x 2" bottom rail, making it an ideal solution for residential, gated