The 9621-M Stainless-Steel Optical Post is precision center-less ground. It has relieved seats on both ends for stable mounting. The Model 9621 is a pack of five 50.8 mm by 12.7 mm diameter posts with a M4 tapped mounting hole at one end and a M6 tapped mounting hole at the other end.

9621米不锈钢光学柱是精密无中心地。两端设有安全座椅,安装稳定。9621型为5根50.8 mm×12.7 mm直径的立柱,一端为M4螺纹安装孔,另一端为M6螺纹安装孔。