Premium Series 0/-30mm Constant Prism System. Fully compatible with leading manufacturers such as Trimble, Sokkia, Topcon, Pentax, Nikon, etc. All metal holder and target warranted for life .

• Hermetically sealed 2-1/2" (62.5mm) precise prism
• Tension adjusting brass knob
• Brass 5/8-11 bayonet adapter