The Poppet Valve is the part which controls air flow through the Fusion Engine™. The valve is available in different levels of restriction to limit or maximum air flow down the barrel which promotes either higher air efficiency or higher velocity, depending on which valve you go with. The Red Low Flow Poppet valve is the Mid-level restriction valve for a good blend of power and efficiency. O-Rings 1x M2.0 x 19.0 (Buna 70) - Poppet Retainer 1x M1.5 x 15.0 (Buna 70) - Poppet Sail 1x 011 (Buna 70) - Poppet Seat 1x 011 (Buna 90) - Poppet Base   Red Nozzle 400fps - 485fps w/ .20g 355fps - 415fps w/ .32g Silver Nozzle 390fps - 450fps w/ .20g 340fps - 390fps w/ .32g Black Nozzle 370fps - 430fps w/ .20g  325fps - 375fps w/ .32g