RBS carries ten, eighteen or thirty pound ball check nozzle body pressures and .500", .750" or 1.00" tip to last thread nozzle bodies. RBS carries .500" length cups that are good for eight to ten pounds, .600" length cups that are good for sixteen to eighteen pounds and .700" length cups that are good for twenty eight to thirty pounds.
Racer must specify which nozzle body tip length and ball check nozzle body pressure from drop down menu.