This is a replacement CO2 Pin Valve. Use our part with x 1.5 thread at the inlet and TR21-4 at the outlet! Fitment: for Tanks With Threads x 1.5. This part has been precision machined from copper, polished, plating. Specification: Color: silver Material: copper Thread: x 1.5 Model: TR21-4 Working Pressure:150Bar Best For Soda Cylinder Tips: When your gas cylinder exhausted,using the type then connector our Co2 regulator. Package Contents: 1 x CO2 Valve Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.