The pressure gauge is connected with extension hose, it is more convenient when you use it underwater and you need to check how much air left. High-quality aviation aluminum materials are safe and . Can fit for the series with M10 x 1 thread. The threaded protective sleeve protects the interface. Name: upgrade pressure gauge replacement Hose length: 61cm/24.02inch Hose material: PT Pressure gauge tray material: Aviation aluminum 6061 capacity: 2L colour: black Material: aviation aluminum Package Contents: 1 x pressure gauge 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.