Features DURABLE MATERIAL: Diagonal eyepiece is crafted from optical glass and ABS to provide long term strength and continuous use, durable and resistant to harsh job site conditions. ACCURATE AND COMPREHENSIVE: Accurate measurements can be made in steep areas, and the eyepiece can effectively measure any target from the distance instrument, as well as points and angles in any direction. CLEAR AND SMALL ERROR: 90 degree elbow eyepiece bring clear imaging, snap interface, easy to observe and reduce error. SCOPE OF APPLICATION: Diagonal eyepiece can be used in tunnels, subways, mines, highways and other inspection, suitable for measuring instruments such as for RUIDE. WIDE RANGE OF USES: The elbow eyepiece is widely used in subway, railway, tunnel, dam, steep slope and other industries. Specification: Item Type: Diagonal Eyepiece Material: Optical Glass, ABS Applicable Model: For RUIDE electronic theodolite. Use: For the measurement of tunnel, subway, mine, highway and so on. Application: Widely used in subway, railway, tunnel, dam, steep slope and other industries.  Package List:1 x Diagonal Eyepiece 1 x Cover1 x Storage Bag Package List 1 x Diagonal Eyepiece 1 x Cover 1 x Storage Bag