Feature 1FINE WORKMANSHIP: Optical glass lenses are carefully polished, and a uniform and delicate coating on the surface can ensure the clarity and long lifespan of the lenses. 2OPTICAL GLASS: The use of optical glass enhances the prism reflection ability, with full texture, clear and bright, more accurate and durable measurements. 3WITH THREADED ADAPTER: The single prism has a brass threaded adapter that can be connected to any 5/8 inch x 11 threaded rod or tripod. 4ALUMINUM ALLOY PROTECTIVE SHELL: This prism is equipped with an aluminum alloy protective shell, ensuring that the glass prism part is not worn and extending its lifespan. 5EASY CARRYING: Compact size and being light in weight as well make the prism easy to carry to different scenes to use.Item Type: Surveying Prism Set Material: K9 Glass, Aluminum AlloyScope of Application: Testing of tunnels, subways, mines, highways, etc.Application: Widely used in various industries such as subways, railways, tunnels, dams, steep slopes, etc. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Prism1 x Dustproof Cover1 x Stand1 x Hand Screw2 x Screw1 x Storage Bag