90pcs Lightweight Piano Washers Piano Keyboard Tuning Felt Ring Pad Musical Instrument Repair Tool Parts Green Specification: Material: Pure wool Net weight: 38g Size: Diameter 22mm/0.87in, thickness 5.2mm/0.2in Application: Piano Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3mm measuring deviation due to manual measurement. Included: 90 X Piano Washers