Compact 25.4 mm mini prism designed for precise surveying and instrument alignment. Engineered for reliable optical performance in field use, this prism delivers consistent measurements with a 5 arc second accuracy and a choice of 0 mm or 30 mm offset for flexible setup. Key benefits angular accuracy: 5 arc second precision reduces angular error and supports repeatable measurement results. Compact, standard size: 25.4 mm / 1 inch diameter fits compact prism mounts and minimizes wind loading on poles and booms. Flexible offset options: 0 mm and 30 mm offsets let you match the prism to common instrument setups and measurement workflows. Standard mounting: 5/8 inch mounting thread ensures compatibility with a wide range of tripod heads, adapters, and prism holders. Complete kit: readytouse package including prism, holder and mount, prism point, and protective bag for transport and storage. Specifications Diameter: 25.4 mm / 1 inch Offset: 0 mm and 30 mm Accuracy: 5 arc seconds Mounting thread: 5/8 inch Compatibility: Compatible with Trimble Japanese Total Station Surveying GPS Package contents Mini prism Prism holder and mount Prism point Prism bag Practical applications Land surveying: use as a target for total station control and boundary measurement where compact size and accuracy matter. Construction layout: set out control points and check alignments on building sites with a portable, easytomount prism. GNSS and hybrid workflows: verify and crosscheck GNSS positions with total station measurements using a small, accurate reflector. Notes for use Attach the prism to any standard 5/8 inch mount or adapter for secure positioning. Choose the 0 mm or 30 mm offset position to match instrument setup before measuring. Store the prism in the included bag when not in use to protect the optical face and accessories. This mini prism offers a practical, accurate solution for field surveying tasks where compact size and standard mounting are required.