It is this bike crank protector features that adopts fine sandblasting technology to form a layer of sand film on the surface, which improves oxidation resistance and makes it more scratch-resistant to against slight bumps, greatly improving riding safety and avoiding possible accidents.This bike crank protector uses stamping molding and anodized cutting technology to provide a structurally stable hollowing design, allowing it to have extremely light weight.Made of aluminum alloy material, the protector is strong, durable and safe to ride.It''s BCD is 104mm.It is compatible with 104BCD, 32-42T, and is available in 32-36T/38-42T two s, which are respectively compatible with 32-34-36T/38-40-42T gear disk.Item Name: Bike Crank ProtectorMaterial: Aluminum AlloyStyle: A(32T-36T); B(38T-42T)Features: Stylish, Anti-collision, ShockproofSize Details: BCD: 104mmNotes:Due to the light and screen setting difference, the product''s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Bike Crank Protector