Deadman-style control valve helps provide dependable on/off blasting operation, Includes 4 sealing blocks total to support service life and maintenance needs, Comes with two (2) 1/8" nozzles for higher-flow blasting applications, Includes one (1) 3/32" nozzle for more controlled, lower-flow work, Great replacement or spare kit to reduce downtime and keep blasting systems ready to run.