?????High Quality Material?: The crank arm made of high quality Aluminum alloy, more firm and durable, effectively extend service life.
?????Size?: About 21 x 2 x 1cm/8.2 x 0.8 x 0.4inch(L x W x H), Crank Arm Length: 170mm, Total length:210mm, Spindle Interface Type: Diamond Hole.
?????Exquisite Workmanship?: This arm crank has fine polish and great paint, which is colorfast and stylish.
?????Widely Usages?: A great replacement of crank arm; Suitable for road bike, mountain bike, folding bike, fixed gear bicycle, etc.
?????How To Use?: Simple operation, can be completed independently. Note: please check if the orientation of your right crank arm is square or diamond keep both left and right arms having the same hole.