Optima All-Metal Prisms Premium Series 0/-30mm constant prism systems. All metal holder and target warranted for life. Mini Prism Systems Small and light provide versatility for shots up to 3000 feet (900m) Tilting Triple Prisms Three hermetically sealed precise prisms. 0/-30mm offset. Leica Compatible Prism Systems -34mm offset with Leica type H.I. Universal Series Prisms 0/-30mm offset. Prism canister and holder/target molded from durable lightweight polycarbonate. Zeiss/Trimble Compatible Prism Systems CST provides affordable prisms fully Zeiss/Trimble compatible. -35mm offset Prism in Canister Thermetically sealed to prevent loss of range or accuracy. Right Angle Prisms Triangular Prism, Penta Prism and Penta Prism with Optical Plummet. Retro Prisms Encased in a light and rugged Lexan container. -30mm offset. Reflector Systems Mini Prisms for reflectorless Total Stations