This mask has a matt finish Non Magnetic Aluminum frame.
This new Flange/Skirt called type-D has a very low internal volume of only 100 cc. The mask also incorporates a very special AR (Anti-Reflection) lens. The new matt finish and AR lens is for avoiding reflection from a search light or when when an operator is covertly approaching a target.
The aluminium frame does not allow other accessories to be attached.
To use the non-magnetic symbol for our diving suits and equipment, we have our products individually tested at QinetiQ, Portland.