The Sokkia Copper Prism 724801 provides precision for prism assemblies. This 62mm diameter tool is copper-coated and housed in a black plastic canister. It is sealed tight to protect its accuracy from moisture and other contaminants. The offset options are 0 and -40 millimeters and it has the standard 5/8 - 11 threading.
This copper prism comes with a 1 year limited warranty.