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.