Description: Feature: Scuba valve refill adapter with 8mm female quick plug. Compact size and , easy to carry and store. Material: Scuba Tank Refill Adapter is made of high quality aluminium material, anti rust, strong and durable. Application: This Tank Filling Adapter is suitable for standard valve. Simple Usage: Valve scuba adapter, simple to operate and connect to fittings, for outdoor use. High Pressure: The working pressure of tank filling adapter up to 5000 psi, with gauge. Specification: Total Length: 14.1cm/5.55inch Block Length: 10cm/3.94inch Block Outer Diameter: 5cm/1.97inch Block Inner Diameter: 3.37cm/1.33inch Color: Black Material: aluminum alloy Package Contents: 1 x Scuba Diving Adapter Only the above package content, other products are not included. Note: Light reflection 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.