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Garage Door Jackshaft Chain Hoist,Roll Up Door Opener:
(1)Gear ratio:4:1;
(2)41B 36 sprocket,1" bore;
(3)22" of 41# roller chain;
(4)26' of hand chain;
(5)Chain keeper;
(6)1/4" * 1/4" 1 3/8" square key (7)runs smoothly without chain jamming
(8)easy to operate (8)strong wear resistance
(9)chain wheel is precision die-cast with a smooth surface Kindly reminder:
1、Before purchase,Please confirm whether the size and other requirements meet your needs.
2、Small parts, please keep away from child.
3、Customer satisfaction is our top priority,if there anything missed or broken,pls let us know.
4、Your advice is welcome at any time.