Innovative full-opening model. Minimal air flow resistance. Durable, shatterproof model for harsh operating conditions. High wear resistance. Easy and secure connection. Type 11 mm. Maximum air flow 162 cfm-76.5 l/s (Delta 7.2 psi / 0.5 bar). Economical air flow 110 cfm-52 l/s (Delta 2.9 psi / 0.2 bar).