1、DURABLE CONSTRUCTION: This mini prism system with side bubbles is an all metal prism assembly with powder spray fluorescent orange and fluorescent yellow targets 2、CLEAR AND ACCURATE: Optical glass accurate detection enhances the reflection ability of prism, full of texture, clear and bright, more accurate and durable measurement 3、HEAVY DUTY PRISM: This heavy duty 25.4mm diameter copper coated prism for fog resistant also features an angled bracket with friction shaft, offset 0mm or ‑30mm 4、SCOPE OF APPLICATION: Mini prism reflector can be used for tunnel, subway, mine, highway detection, suitable for Leica 5、COMPLETE ACCESSORIES: Prism system kit with U frame, adapter, S hook, lid for easy installation and use, and bag for easy storage and carrying