American made valve perfect for air compressors with high flow requirements Set Pressure Tolerances: ±3% of set pressure. Temperature Range:-65°F to 400°F Construction: Seat, cap, and piston: C360 brass (ASTM B-16). Spring: 17-7 stainless steel, Seal: Silicone Performance: Bubble tight within 5 PSI for set pressures ≤ 50 psig. Bubble tight within 10% for set pressures > 50 PSI 100% tested or 2.5 AQL sample testing, conforming to API 527. Stamped with UV and NB symbols All valves will have thread tape applied or supplied 6 month no hassle warranty Sellerocity American Made Safety Valve Compatible With Coleman Powermate Sanborn 136-0037