Garage Door Opener Parts - Sprockets
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LiftMaster 71-1550B60QKH Sprocket Kit, 60 Tooth, 1.25"BX3/8"KSKU: 71-1550B60QKH$62.00Special OrderWhat does this mean?60-tooth sprocket kit with 1.25" bore and 3/8"…
LiftMaster 71-1550B60TKH Sprocket Kit, 60 Tooth, 1.5"BX3/8"KSKU: 71-1550B60TKH$65.29Special OrderWhat does this mean?60-tooth sprocket kit with 1.5" bore and 3/8" keyway. …