Description: Scuba diving threaded dust plug protector for DIN valves work with either 200-bar or 300-bar DIN valve fittings With swivel attachment lanyard Lightweight, strong, portable and saltwater resistant The plug is vented so that the presence of high-pressure gas does not trap the plug and makes it difficult to remove Great replacement accessories for underwater scuba diving din first stage regulator Specification: Material: Plastic Color: Black Height: Approx. 2.5 cm/0.9 inch Outer Diameter: Approx. 3.3cm/1.2 inch Screw inner diameter: 1.58cm/0.6 inch Package Includes: 2 Pieces DIN Tank Valve Dust Plug Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!