Post Collar, Adjustable Height, 0.5 in. Optical Posts, Qty 5

The AC0.5-PK ajustable hight optical post collar pack contains five AC0.5 post collars. The AC0.5 when used with the PMC1.0 post holder collar allows for precision height adjustment of an optical post mounted in a VPH post holder.  A notch in the collar for the pin in the PMC1.0 prevents the optical post from rotating during height adjustment.