• King 306
• King 600 series trombones
• King 2B, 2B+, 3B, 3B+, 4B, 5B, 6B, 7B and 8B trombones
• King KTB301
• Benge 170, 165F, 175, 190F, 290
• Conn 52H, 56H, 66H
• Bach BTB301, BTB311
• Bach TBSOL210
NOTE: This is a service part and as such may require some adjustment for proper fitment, including filing, lapping, or other common repair shop operations.