Feature: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 AdjusterWeight: Approx.45g / 1.6ozMaterial: 7075 Aluminum Pretightening Ring + Aluminum Alloy ScrewPurpose: Perfect Adjustment Of Your Bearing ClearanceCompatibility: 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 / 1.1inPurpose: 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