ADM Accessories R Series Guide Rings - 150 mm
ADM 150 mm R Series Guide Ring Set
150 mm guidescope rings with 3/8" aluminum adjusting screws featuring large 1/4" Delrin tips. Made of stainless steel and thoroughly anodized for maximum longevity. Provides an excellent way to mount a guidescope to a large Dobsonian rocker box or OTA tube rings. Each ring has three 1/4" x 20 TPI holes. The center hole is placed over a 1.25" flat base while the others are 1/2" from the center hole and 1" apart from each other.