These post are manufactured with non-magnetic stainless steel grounded to 12mm diam. On one side a M4 hole allow mounting optomechanical device while the M6 hole on the other side allow the post to be mounted on the round or rectangular base. Can be use also with our CLXA column. A side hole where to insert a screwdriver or an hex key provide extra leverage to tighten the post. Available in various standard height and can be modified upon request.