Great replacement accessories for underwater scuba diving din first stage regulator Lightweight, strong, portable and saltwater resistant,With swivel attachment lanyard The plug is vented so that the presence of high-pressure gas does not trap the plug and makes it difficult to remove Scuba diving threaded dust plug protector cap for DIN valves work with either 200-bar or 300-bar DIN valve fittings High Wear-resistant and durability Colour: black Material: plastic steel Size: 3 x 3cm Package Contents: 4 x DIN Tank Valve Dust Plug Only the above package content, other products are not included. Note: Light 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.