This fully tilt able 360° prism assembly is the first and best choice for standard prism assemblies. These are high quality assemblies at an affordable price. Features: - 0/-30mm Single Tilting Assembly - ±2 arc second 73mm prism - M20 Universal Threaded Insert - Dual-sided target 5.5″x5.5″ (14cmx14cm) - Vertical axis alignment sighting - Stainless steel hardware - Bayonet adapter (5/8-11 female thread) - Fully tilt able 360° without removing prism - Also available in yellow and chartreuse upon request.