21126-1006238-00 is installed in the automobile engine to adjust the belt tension force, it consists of ball bearing, pulley & seals etc. Statistical Process Control (SPC) and noise testing prior to packaging ensures the product that you receive is made to high quality level.
 

Refer to samples cost , we will revert it to you when we start our business transaction. Or if you agree to place us your trial order now, we can send samples in free of charge.