Compatible with chain drive units from Sears, Master Mechanic and other major brands. Compatible with 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 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. Color: Photo Color Material: Plastic Package Contents: 1 x Gear and Sprocket Kit Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the actual product. Measurement may vary by +/- 1-3 cm.