LiftMaster 3/4 HP and 1 HP Trolley Operators Track/Chain Size:Up To 18 ft. (2) Center brackets

(2) Center brackets

If you need the left-hand version

and Green when fully open

Rate of Travel: 1

Faceplate has Multiple Hole Configuration for more mounting options

LiftMaster 3/4 HP and 1 HP Trolley Operators Track/Chain Size:Up To 18 ft. (2) Center bracketsLiftMaster 3 4 HP and 1 HP Trolley Operators Track Chain This LiftMaster Track Chain is used for the GT, all SD, and all GSD 3 4HP and larger Commercial Door Operators. 8ft. Includes (2) 10 5808 P TRACK, TROLLEY, FOR 8FT DOOR, PRE PUNCHED (1) 19 5112 CHAIN, TROLLEY,#41, FOR 12FT DOOR 10ft. Includes (2) 10 5810 P TRACK, TROLLEY, FOR 10FT DOOR, PRE PUNCHED (1) 19 5112 CHAIN, TROLLEY,#41, FOR 12FT DOOR 12ft. Includes (2) 10 5812 P TRACK, TROLLEY, FOR