Description The Ninja regulators can switch from standard 800-900 PSI output to medium 650 PSI or low 450-550 PSI power in minutes by removing washers. This eliminates the need to buy 2 regulators or separate spring sets. Made in the USA. All black tactical ninja aluminum valve caps include SRT piston, sonic recharge technology, piston coated aluminum piston that produces an industry leading recharge rate and virtually eliminates Reg Shoot Down Spa ? Washer Adjustment Pressure Change the output pressure by adding or removing washers, not springs or pistons. Mini filling valve. No wrist digging, low profile design, fill valve, meets all DOT, CGA and ASTM specifications. Fully user rebuildable Each knob is handmade and factory tested. Super low response curve 0-50 psi from full to empty. Safety ASTM compliant. ASTM Compliant Hole and safety groove mini The filling valve is hardened, coated regulator rated at 5000 psi, installed to ASTM specifications.