Robinair's Metering Tank Adapter allows refrigerant gas recovery via the liquid port of a virgin refrigerant cylinder with a low side coupler for fast filling of your internal cylinder. Metered design fitting features a small orifice to prevent refrigerant flooding thereby preventing damage to the recovery unit's compressor. Threaded female end attaches to tank and features an R-134a low side service coupler. Machined brass fitting has a deeply knurled base for better grip when hand tightening. Made in the USA. Robinair, a Bosch Automotive Service Solutions brand, is a global leader in service tools and equipment based in Owatonna, Minnesota. Robinair is recognized throughout the world as the quality and performance leader in AC/R evacuation tools and this position has led to its success with the full range of products that serve the heating/ventilating/air conditioning/refrigeration (HVAC-R) and mobile markets, which includes the automotive aftermarket along with other industries such as agriculture and construction.