Specifications
[Dimensions (DIAxD)] 132x35mm / 5.2x1.4inches
[Weight] Approx. 170g / 6 oz
[Depth rating] 100m
[Construction] Corrosion-resistant aluminum alloy

Specifications
[Dimensions (DIAxD)] 132x45mm / 5.2x1.8inches
[Weight] Approx. 220g / 7.8 oz
[Depth rating] 100m
[Construction] Corrosion-resistant aluminum alloy

Specifications
[Dimensions (DIAxD)] 132x55mm / 5.2x2.2inches
[Weight] Approx. 280g / 9.9 oz
[Depth rating] 100m
[Construction] Corrosion-resistant aluminum alloy

ML-NX Conversion Ring, when used, allows for the use of NX ports and extension rings on ML housings.

Specifications
[Dimensions (DIAxD)] 133 x 41.2mm / 5.2 x 1.6 inches
[Weight] Approx. 199g / 7.0 oz
[Depth rating] 100m / 330ft
[Construction] Corrosion-resistant aluminum alloy (alumite coating)
[Distance] Between the mount and the front end: 30mm / 1.2 inches (with port lock)

Extension ring for mirrorless interchangeable lens cameras (equipped with port lock).

Specifications
[Dimensions (DIAxD)] 97 x 36mm / 3.8 x 1.4 inches
[Weight] Approx. 111g / 3.9 oz
[Depth rating] 100m / 330ft
[Construction] Corrosion-resistant aluminum alloy (alumite coating)
[Distance] Between the mount and the front end: 25mm / 1.0 inches