It's used to install in RDX-series housings and transfom into Sea&Sea Compact Macro Port series and Compact Wide Port L #30103.
Specifications
Dimensions (DIAxD): 102 x 15mm / 4.1 x 0.6inch
Weight: Approx. 90g / 3.2oz
Depth rating: 100m / 330ft
Construction: Corrosion-resistant aluminum alloy (anodized)
Extension length: 11.2mm / 0.4 inches