Keyboard Accessories -Piano Front Balance Rail Wedge Punches Highlights Generic Brand Piano Front Balance Rail Wedge Punches Description: 1 pack (about 270 pcs) Small Piano Balance Front Rail Wool Felt Punches Upgrade keys and regulation of the distance to travel when pressed Perfect DIY piano accessory for pianist Easy to install, convenient to use Material: Wool Color: White Size Chart: Diameter: approx. 12mm / 0.47inch Hole Diameter: Approx. 2 mm / 0.07 inch Package includes: 1 pack of piano front rail punches (about 270 pieces) Note: Color may be slightly different due to the color calibration of each individual monitor. Please allow slight measuring deviation due to manual measurement.