1) T-35mm: 5.8psi, 7.25psi, 8.7psi 2) T-38mm: 5.8psi, 14.5psi 3) T-40mm: 10.15psi 4) color as customer need Color: purpleSize: T-35MMSpring Rate: T-35mm: 5.8psi, 7.25psi, 8.7psi Workmanship: Chrome finishInclude: Inlet and Outlet flanges and clamps, air fittings, spring seat, fastenersHigh temperature silicone Nomex reinforced actuator diaphragm Chrome waste gate T-35MM