The AdirPro 720-07 Prism is an all metal prism assembly for land surveying in conjunction with total stations. This surveying instrument is fully compatible with leading manufacturers such as Trimble, Sokkia, Topcon, Leica, Nikon, Pentax, and many others. The heavy-duty 2 1/2" (62.5mm) diameter silver-coated prism is sealed in a strong canister to prevent water and dust from getting inside and has a 0 or -30 millimeter offset and 2.5 arc second accuracy. Because of the high visility orange, this prism is easy to see and find the target among trees and bushes. It also incorporates a simple locking mechanism with tension adjusting brass knobs that are easy to set while adjusting the prism and target tilt. This survey gear is constructed from stainless steel hardware to resist rust and increase visibility. Its brass thread adapter can be mounted to any 5/8 inch - 11 thread pole or tripod. This orange color 0/-30mm tilt prism set also includes a carrying case. The AdirPro survey prism comes with a 1 year warranty.