Manifold Gauge Set HVAC refrigeration system auto air conditioner repair tools brass AC Charging Hose good quality Connection:1/4SAE aluminum body rubber ring shock absorber Selectable Refrigerants: R134A R22 R12 R502 R410A R404 R1234YF charging hole 2500PSI 3000PSI 4000PSI 36” 48” 60” 72 "96"