Estone&reg; New 36" A/C Charging Hose Set for HVAC Air Condition Refrigerant R12 R22 R502 Special high quality material of hoses for high pressure and brass made connections for durability. This set of hoses provides you safety and convenience to test, diagnose and recharge any HVAC system Suitable for almost every car. Easy to install and use. Designed with a special material for high pressure Working pressure: 500PSI, Burst pressure: 2500PSI