Compatible with chain drive units from Sears, Master Mechanic and other major brands. Fits models 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 Sears, Master Mechanic and garage door openers from 1984 to current. Compatible with garage door opener models: 1040, 1045, 1050, 1055, 1060, 100WD, 200WD, 300WD, 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 compatible with this kit: 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. Color: Photo Color Material: Plastic Package Contents: 1 x Gear and Sprocket Kit Only the items listed above are included; other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.