Coatic Carbon Fiber Washer Mod 8 yet very effective 4308 yet very effective at <400 nm in length Coatic Super Premium Carbon Fibre Washer Modification which creates a Gap compatible with Rupes bigfoot lh21 lhr15 and lhr12e duetto systems a must for professionals looking to supercharge backing plate rotation and correction power by bypassing the backing plate shroud and allowing for a higher spin rate and free spin orbits to enhance the compounding action of the polisher This Washer Modification is considered a 'Mod' to your rupes dual action machine polisher which creates a gap to increase backing plate rotation which is limited