Bike-Cycle-Bicycle Fibrax Bmx Chain Adjuster-Tensioner 

Pair of Chain Tensioner Adjuster BMX Track Fixie Pocket Motor Bike 3/8 10mm Old School

Features:

• Pair (2) of threaded Wheel Axle / Frame Chain tensioner
• Thread length 27mm with 10mm nut
• Fits 10mm / 3/8 Axles