... migration which contaminates expensive refrigerants3 Rubber layer for permeation, braid for strength, and outer cover for protection1 Double barrier protectionMoisture barrier provides improved ... charging hose, W.P./B.P.: 600psi-3000psi is available2 For 3/8'', 1/2'', 5/8'' charging hose, W.P./ ... 4000psi or W.P./B.P.: 500psi-3000psi are available3 For vacuum hose, 36'' hose will pull to 25 Microns and ...