Product Overview Drive Medline's 870 Regulators have a barb outlet, can have their liter flow be easily adjusted and are green in color. FeaturesNew click style liter flow control.Lightweight uni-body design.Meets or exceeds accuracy standards for ASTM, American National and CGA.UL Approved. Barb OutletWarrantyLimited Lifetime Warranty.1 Each / EachPart Number(s):18301G - Adult, Liter Flow Increments: 0, .12, .5, 1, 1.5, 2, 2.5, 3, 4, 6, 8 18300G - Pediatric, Liter Flow Increments: 0, .03, .06, .12, .25, .5, .75, 1, 1.5, 2, 2.5, 3 Reviews (1 review) Write a Review 1 Review Hide Reviews Show Reviews 1 Regulator Posted by James McCutcheon on Oct 9th 2020 Very unhappy. I still,have not received it.