This is the 1/8 vented clutch bell from UR. This bell has been designed with three irregular holes to allow for ventilation, contributing to the cooling of the bell and the clutch shoes for greater lifespan, while also allowing for the removal of debris for smoother operation. It includes 2 bearings. This bell is ideal for the UR Compak Clutch System. Available in 13, 14, 15, 16, and 17 teeth.