Compatible with chain drive units from , , , Sears, Master Mechanic and . Compatible with 2245, 2255, 2265, PD210, PD212, PD610, PD612K, 1200 Series, 1240, 1245,1246, 1250,1255,1256, 1260,1265 and more. Not all models listed. Replacement Gear and Sprocket assembly compatible with chain drive , Brand Sears , Master Mechanic and garage door openers 1984 thru current Compatible with garage door opener models 1040, 1045,1050, 1055, 1060, 100WD, 200WD, 300 WD, 1140, 1145, 1150, 1155, 1160, 110WD, 210WD, 310WD, 1240, 1245, , 1250, 1255, 1260, 1260LK, 1245LK, 215WD, 220ED, 315WD, 320WD, 1240R, 1245R, 1255R, 1265, 985, 2265, 2565, 2245, 2255, 140, 150, 240, 350, 450, 550, 700WHC, 1000, 2000, 4000, 5000, 710WHC, 1100, 2100, 4100, 5100, 7200, 1200, 2200, 4200, 6200, 7220, CG40, PD210, PD610, PD612K, 7420 Partial list of 139.xxx models that this kit would work for: 139.18847 139.18857 139.53225SRT 139.53225SRT1 139.53325SRT 139.53325SRT1 139.53335SRT3 139.53425SRT 139.53425SRT1 139.53525SRT 139.53535SRT1 139.53627SRT 139.53628SRT 139.53628SRT1 139.53629SRT 139.53629SRT1 139.53635SRT 139.53635SRT1 139.53636SRT 139.53637SRT 139.53637SRT1 139.53640SRT 139.53641SRT 139.53644SRT 139.53645SRT3 139.53646SRT2 139.53647SRT1 139.5364812 139.53648D 139.53648SRT2 139.53650SRT 139.53660SRT1 139.53661SRT1 139.53661SRT3 139.53662SRT 139.53662SRT1 139.53662SRT2 139.53670SRT 139.53670SRT1 139.53671SRT 139.53671SRT1 139.53671SRT2 139.53671SRT3 139.53672SRT1 139.53672SRT2 139.53672SRT3 139.53673SRT 139.53673SRT1 139.53673SRT2 139.53673SRT3 139.53674SRT1 139.53674SRT2 139.53675SRT 139.53675SRT1 139.53675SRT2 139.53677SRT 139.53677SRT1 139.53677SRT2 139.53677SRT3 139.53824SRT Colour:Photo Color Material:plastic Package Contents: 1 x Gear and Sprocket Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.