This charging hose is suitable for testing R12, R22, R404, R502, and R134A refrigerants for car air conditioner use. It's designed with standard 1/4" SAE fitting. The hoses comes with high working pressure of 600 PSI and burst pressure of 3000 PSI. The hose is made of premium rubber which is oil-resistant, durable, wear-resistant, corrosion-resistant, do not harden in cold days, provide convenience and long life working. Features - Color: Shown in the pictures - Material: Rubber Metal - Size: 180x1x1cm - Max Working Pressure: 600PSI - Burst pressure: 3000PSI - Rubber tube which is oil-resistant, wear-resistant, corrosion-resistant and doesn't harden for durable use. - Compatible with refrigerants R12, R22, R404, R502, and R134A, etc. - Comes with 1/4" SAE fitting on both ends. - Complete and professional diagnostic and service gauge set for use on automotive and home air conditioning systems. Easy to install and use. Provides you safety and convenience to test.