Yellow/Gray 1/2” ACME 50 lb. D.O.T-Approved Recovery Cylinder with Float Switch Powder coated cylinder for high gloss, durable finish . Y-valve for liquid/vapor . 3/4” NPT opening accepts 80% fill float switch shut-off device . 1/4” opening for air purge valve . Collar design for ease of handling . Reusable and conforms to DOT-4BA400 specifications and ARI guidelines . Pre-charged cylinder provides a clean, dry interior . Storage and transport of recovered refrigerant gases . Valve & Float Switch UL Listed . AUS Approved and TC Canadian Approved 66011