General description This Soda Bottle Refillable CO2 Valve is a replacement CO2 Pin Valve designed for use with carbonator cylinder tanks. It features an M18x1.5 thread at the inlet and a TR21-4 output, making it compatible with tanks that have M18x1.5 threads. The valve is precision machined from copper and polished for durability. Technical specifications Color: Silver Material: Copper Thread: M18x1.5 Model: TR21-4 Working Pressure: 150 Bar Usage This valve is best used with soda cylinder tips. When your gas cylinder is exhausted, use this connector with your CO2 regulator to refill it. Other information Package Contents: 1 x CO2 Valve Adapter Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product. The measurement allowed error is +/- 1-3 cm.