70mm outer diameter aluminum anchor ring made by ISC Wales from 7075 T6 aluminum for strength, durability and lightness. The inner diameter is 46mm and the bar is 12mm. Anodized in red to help differentiate from the small and large ring when viewed from a distance. eg on a cambium saver in a tree. 100% inspected and proof tested to 16kN. Multiple uses for tree climbers from friction savers to SRT anchors.