Feature: 1. Durable Constraction: This mini prism system with side bubble is a metal prism assembly that is powder painted fluorescent orange and fluorescent yellow targets. 2. Accurate Measurement: Surveying prism is accurately inspected with glass, which enhances the prismatic reflective ability, with full texture, clarity and brightness for more accurate and durable measurements. 3. Fully Equipped: This 25.4mm diameter copper coated prism for fog prevention also features a tilting holder with friction axes, zero or ‑30 mm offset. The prism includes an S hook and bracket for handheld work, a point for stake outs. 4. Easy to Carry: This survey prism is very light, and you can bring surveying prism anywhere without any hassle. This prism is small, durable and easy to store. 5. Widely Used: Mini prism reflector has a wide range of applications. Widely used in tunnels, subways, mines, highways, and other inspections, suitable for Leica. Specification: Item Type: Surveying Prism Material: Optical glass and aluminum alloy Constant: 0 or -30mm Effective Diameter: Approx.25.4mm / 1in Scope of Application: Detection of tunnels, subways, mines, highways, and applicable for Leica. Package List: 1 x Surveying Prism1 x U Shaped Frame1 x Adapter1 x S Hook1 x Cover1 x Storage Bag