LiftMaster LM21XPBB Extended Performance Release Device with Battery Backup sea swing gate Each unit is configurable as

Each unit is configurable as a master or slave operator

65000 cards

Electro-mechanical barrier 24V for intensive/very intensive use for lane width from 2 up to 6m

Max leaf weight: 4400 Lbs

This is a replacement Pulley (8"x5/8" 4L Belt)

LiftMaster LM21XPBB Extended Performance Release Device with Battery Backup sea swing gate Each unit is configurable asLiftMaster LM21XPBB Extended Performance Release Device with Battery Backup The LiftMaster LM21XPBB Release Device is a UL ULC listed normally energized fail safe device designed for use on rolling doors, single slide, center parting level, and inclined track doors. This device is a normally energized fail safe releasing device incorporating state of the art electronic control circuitry. The release device responds to emergency conditions generated