Euphonium/Tuba Piston Lapping Tool / For Yamaha When the pistons of a trumpet start to move poorly, the first maintenance step is usually cleaning the inside of the casing and the pistons. If that doesn't resolve the issue, you'll likely try using plenty of valve oil to lap the pistons and casing together. Simply moving the piston up and down vigorously often isn't very effective. This product is a dedicated tool designed to efficiently perform such lapping work. The rod that connects to the piston is made of durable stainless steel, ensuring reliable use. 【Usage Notes】 ・While we have confirmed compatibility with Yamaha products, we have not verified compatibility with other manufacturers' products. ・In the unlikely event that the tool becomes stuck to the piston after use, please refer to the photos provided to remove it. 【Main Specifications】 ・Materials: Handle - Brass, Piston Connection Rod - Stainless Steel ・Size: Handle - Approximately 8cm, Piston Connection Rod - Approximately 125mm ・Weight: Approximately 140g #Euphonium #Tuba #Bass #Piston #Repair #Maintenance #Tool #Lapping #WindBand #RepairTool