Gehmann - Centering Unit A/G Tubes (555-Z) Ratchet and 1-1/4"-12 without bushing

and 1-1/4"-12 without bushing

Most commercially available brass has variances in the case neck thickness

These specially prepared modified cases are threaded at the case-head and have a

a micrometer advances the spindle 0

The Ear spacing or the Ear separation

Gehmann - Centering Unit A/G Tubes (555-Z) Ratchet and 1-1/4"-12 without bushing555 Z Centering unit for 55559 and 559 (new version) rearsight anti glare tubes Ideal supplement addition to our anti glare tube range, featuring external and internal thread (M. 18) to accept iris (55552), polariser (55553) or element holder (55546) below Our new 555 Z has been produced to do the same job as 55552 and 55546 when it comes to their ability to be able to move within their mounts but with much more precision when adjusting the height and