Features: 1.The core is a poppet valves assisted by a spring that is threaded into the steam Each valves has a core and a cap with valves core remover. 2.The caps are made of brass they are provided with core remover and have an inside rubber o-ring. Higher tightness much more durable. 3.The stem is a self-contained valves which opens to admit gas to a chamber Different from the common 0.3mm copper pipe wall thickness on the market our wall thickness is 0.6mm which is more durable. 4.The copper tube length is 90mm/3.54in. And total length is 118mm/4.64in. A pack of 10 pieces air conditioner check vavles. 5.Widely used in the air conditioner refrigerant system it used to charge the refrigerant. Package Includes: 10 Pieces Air Conditioner Check Valves Specifications: Material: Red Copper Type (Channel Position): Straight-through Color: As picture shown Copper Tube Length: Approx. 90mm/3.54in Total Length: Approx. 11.8cm/4.64in Outer Diameter: Approx. 6.35mm/0.25in Thickness: Approx. 0.6mm/0.02in Weight: Approx. 200g Quatity: 10 Pieces Air Conditioner Check Valves note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors the picture may not reflect the actual color of the item. Thank you