Pneumatic Push Fit Check Valve One Way Non-Return Directional Valve 4mm-12mm Product name：Pneumatic check valve Product material： Plastic, copper nickel-plated Valve spool: copper Fluid: clean air Use of piping: PU pipe, nylon pipe Product size: 4/6/8/10/12mm Opening pressure: 0.15Mpa Ambient temperature: 0 ~60°C Functional characteristics: Stop gas backflow Caution: Due to manual measurement, please allow a small error. Thank you for your understanding. The monitor is not calibrated and the color of the item shown in the photo may be slightly different from the actual item. Please refer to the actual product.