Item Descriptions:-The throttle valve hose joint is made of plastic and copper, which has high compressive strength, high stability, corrosion resistance, and durability.-The throttle valve hose connector has high pressure resistance, can withstand high pressure without tripping, and can work for a long time without tripping.-The pneumatic quick connector is easy to install. Simply push the connecting pipe with compressed air to ensure a secure connection without the need for additional sealing.-Pneumatic quick connectors are mainly used to quickly connect air hoses and pneumatic tools, to adjust the air source and change the driving speed of pneumatic jacks or other operating components.-Package includes: 5 pieces 8mm Tube Straight Union Push to Connect Tube Fitting Regulator Valve.Package:5pcs 8mm Tube OD Air Flow Control ValveItem Specifications:Material:Plastic, copperColor:BlackSize:50x43mmAperture:8mm