LiftMaster LM21XPBB Extended Performance Release Device with Battery Backup sea swing gate This is a replacement Pulley

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

Handing: Reversible and self-handling

New Part Number: Q3554 (Old Part Number: 3554)

65000 cards

This is a Gear Reducer Replacement Kit (30:1

LiftMaster LM21XPBB Extended Performance Release Device with Battery Backup sea swing gate This is a replacement PulleyLiftMaster 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