Aluminum knob M10 measuring 50 × 55 mm with silver handle for pins, suitable for fitness equipment models 3001, 3002, 3003, 3014, 3015, 3018, 3037, 4010, 4011, 4112, 4046, 4143, 4159, 4335, 4337N, 4340, 4351, 4354, 4352, 4373, 4375 and 5014.