Yamaha French Horn Rotary Valve Stop Arm Screw (1) and String Screws (2)
2 x Rotary Valve Stop Arm String Screws - Yamaha Part Number E0141051. 1 x Rotary Valve Stop Arm Screw - Yamaha Part Number E0141041. These fit just about every Yamaha French Horn model that uses the traditional string lever system.