Aprilia Black Clutch Reservoir Sock Cover Fits RSV, RSV4, Tuono, Mille 1500 Simply slip it onto your motorcycles brake/clutch reservoir's and cover up those ugly plastic reservoirs while adding a nice touch to your bike Fully embroidered logos onto the reservoir sock covers Traps and absorbs brake fluid that's vented from the reservoir, Prevents brake fluid from getting on your helmet and/or your motorcycle, damaging paint and corroding metals Keeps direct sunlight off of the brake and clutch reservoirs Prevents break down and discoloration of your brake fluid and plastic reservoirs caused by suns damaging UV rays