The Seco Silver Prism Assembly 6402-05-FLB offers surveying professionals a silver-coated prism with a 62 millimeter diameter, -35 millimeter offset, and less than 5 arc second accuracy. Secured in a heavy-duty plastic canister, this prism is also water-resistant. The prism's M20 thread attaches easily to the aluminum tilting holder. The holder features a front locking clamp, a 100 millimeter axis height, and a 5/8 x 11-inch thread. A fluorescent yellow and black (not pictured), 6 inch by 9 inch target also connects to the holder and is highly visible in all working conditions.