Suited for R12, R22, R502 With sight glass brass testing ... for R12, R22, R502·With sight glass brass testing manifold body ·3pcs(red,yellow & blue) charging hose. ·Low&High pressure gauge ... (2-3/4” Dia) ·Working pressure 600PSI Burst 3000PSI ·Designed to meet 1/4"SAE requirement for refrigerant permutation ... .Certification:CQC,CE,VDE,ISO9001,ROHS,UL Aluminum Mainfold Gauge