With safety explosion-proof disc. The interface is DIN. International Standard connecting thread and outlet threads Universal for air respirator or DIN interface diving equipment. High performance Specification Name:High pressure cylinder head valve Size: 10X4.5cm approx. Working pressure: 30Mpa Import connection thread: M18 x 1.5 Outport Thread: DIN, G5/8 Internal Thread Colour:Silver + Black Material:copper Package Contents: 1 x High pressure cylinder head valve 1 x O-Ring Only the above package content, other products are not included. Note: Light shooting 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.