Eye Piece for Creedmoor Diopter

It is interchangeable on the Creedmoor sights USA 430, 431, 461, 465, 404, 405, 406, 407 and 446, having 8 viewing holes of different diameters: (.012 /.020 /.031 /.039 /.051 /.063 /.078 /.086" - 0,3 / 0,5 / 0,8 / 1 / 1,3 / 1,6 / 2 / 2,2 mm) placed on a rotating disk, which can be selected without disassembling or loosing the eye piece, following the available light. The eye piece has a rubber ring to avoid any inconveniences due to recoil.