The Bell Circle Grommet Vent Kit is a replacement for the stainless circle grommets found in many Bell helmet models. Including 12 pieces, it is compatible with the Bell GP2 Youth Kart Helmet, GP3 Sport, K1 Sport, K1 Pro, K1 Pro Circuit (Blue, Red), M8, M8 Carbon, and iRacing helmets. Improve your helmet's ventilation system with this kit.