Enhance the performance of your marine engine with these CAMP Marine Engine Donut Collars for Shafts. Crafted from high-quality zinc, these collars are designed to fit shafts ranging from 1-3/4 inches in diameter. The collars are compatible with a wide range of outboard engines and are an essential component for any boater seeking to improve their vessel's acceleration and throttle response. CAMP is a trusted brand in the marine industry, and these donut collars are no exception. They are easy to install and are a great addition to any boat parts collection. Upgrade your marine engine today with these CAMP Marine Engine Donut Collars for Shafts and experience the difference in performance for yourself.