Features： 1、Manufacturing Material: Made of 7075 aluminum pretightening ring and aluminum alloy screw, it is durable and strong, which undoubtedly extends its service life. 2、Compatibility: Suitable for DUB cranks, including for XX1 Eagle DUB and for X01 Eagle DUB, flanged inner ring is not compatible with fat bicycle crank. 3、Purpose: Good for adjusting your inner bearing clearance, for DUB crank preload ring kit, also for adjusting crank shaft bearing clearance spare part kit. 4、Alternative Colors: Available in a variety of colors, can be selected according to own needs. 5、Simple Operation: Simple to operate, easy to use, easy to install and disassemble. Specification： Item Type: Bicycle Crank Alloy Bottom Bracket Adjuster Weight: Approx.45g / 1.6oz Material: 7075 Aluminum Pretightening Ring + Aluminum Alloy Screw Purpose: Adjustment Of Your Bearing Clearance Compatibility: Suitable For DUB Cranks, Including for XX1 Eagle DUB and for X01 Eagle DUB, Flanged Inner Ring Is Not Compatible With Fat Bicycle Crank. Axis Diameter: Approx.28.99mm / 1.1in Purpose: Good For Adjusting Your Inner Bearing Clearance, For DUB Crank Preload Ring Kit, Also For Adjusting Crank Shaft Bearing Clearance Spare Part Kit. Product Size: Approx.7 x 35mm / 0.3 x 1.4in Package List： 1 x Pretightening Ring