Optical Post Holder 10 Pack, No Slip, 4.0 in. Height, 0.5 in. Posts, 1/4-20

The VPH-4-PK Post Holder Pack includes 10 standard optical post holders with a Standard Optical Post Holder has a 4.0 in. height, and a spring-loaded brake shoe design which applies a constant force to 1/2 in. diameter optical posts even when the thumbscrew is loosened. This allows the orientation of an optical mount to be easily adjusted with one hand. This post holder is designed for standard posts, and has a 1/4-20 threaded hole in it's base. Pack of 10.