LiftMaster 041B0591 Battery Backup Kit (Qty. 2) 7.5 ft arm in the driveway

in the driveway

Hydraulic lock of the gate in open and/or closed positions

Upper pin for the hydraulic cylinder

eyes and attachments

LiftMaster 041B0591 Battery Backup Kit (Qty. 2) 7.5 ft arm in the drivewayLiftMaster 041B0591 Battery Backup Kit (Qty. 2) This is a Battery Backup Replacement Kit. For use with various LiftMaster and Chamberlain Garage Door Openers; featuring a battery backup system (BBU). Complete kit includes (2) 12V, 4. 5AH Batteries. Check the manual or replacement parts diagram for specific part information before ordering to ensure compatibility. Also known as: LiftMaster 41B591 LiftMaster 012381415915 LiftMaster 9000001