Made of anodized aluminium. Secured with 3 set screws by means of hex key (included).

32 pitch (mod 0.8).

Inner diameter - 70.7 mm
Outer diameter - 85.5 mm
Width - 18 mm
Weight - 80 g

Purposed for Angenieux 70-210mm zoom lens, but will work on on other lenses with about 70mm focus ring diameter.