Features: 1.Fixed with Black Ring on the canister 2.Large aperture (64mm) designed for more efficient and accurate surveying and monitoring purposes 3.Different Accuracies (3/5/8 arc seconds) for option to meet various surveying and monitoring tasks 4.Coating Protective optional: silver-coated, copper-coated and/or anti-reflecting 5.Water-proof (W) optional 6.Prism sealed in red ABS Canister (1-piece) 7.Prism Canister colors optional: red, black, orange yellow, orange red, blue... 8.Equipped with 5/8 inch Thread mounting on most popular Prism Holders 9.4 Prisms packed into a red or yellow padded nylon carrying bag for easy and secure transport 10.Each prism comes with a white dust-proof Cover 11.Completely compatible with all present Top-brand Theodolites or Total Stations 12.Services in OEM, ODM, CKD and/or SKD are available based upon bulk purchasing! 13.One-year guarantee offered! Any updating would be subject to change without prior notice.