Made of high-quality plastics and brass for long-lasting use.High pressure resistance,can withstand strong pressure without tripping out. The release ring adopts the ellipse design to make it more convenient and labor-saving for disconnection. Stainless steel locking claw, never stuck, never rust. Type:Push in fitting/Push to connect /Size:12mm Straight Union Connector Working Temperature:0-60°C / 32～140°F/Negative Pressure:-100Kpa / -29.5 In Hg. Applicable pipe: PU/PA/PE/PVC.