Features: Fit for most motorcycle brake calipers, brake clutch masters. Not easy to glide: motorcycle hollow screws have good performance, threads are clean and do not glide easily. Each component is precision-machined to exact tolerances for trouble-free performance. Long lasting durability. Just rotate fitting to properly install in place. Please allow 1-2mm differences due to manual measurement. Specification: Color: Silver Tone, Purple Copper Tone Material: Metal Washer Inner Diameter: 16.3mm / 0.64"(D) Washer Outer Diameter: 22mm / 0.87"(D) Screw Size: 38x24.5mm / 1.50"x0.96"(L*W) Thread Size: M16x1.5 Package Includes: 2 Pcs Motorcycle Hollow Bolt Screw 4 Pcs Washers