90 L type bracket prism, LEICA MODEL NO.: GMP104; 90L RIGHT ANGLE PRISM, MAYBE MOUNTED ON THE TUNNELS, ROADS AND BRIDGS, DAMS, BUILDINGS AND CONSTRUCTURES OR SOME OTHER FIXUP PLACE OR OBJECTS FOR SURVEYING, DISTORTION, DISPLACEMENT. IT SUIT FOR DEFFIRENT KINDS OF TOTAL STATIONS.

*Effective diameter: Φ 25.4mm;
*Offset: -25.3mm
*Accuracy: 5"
*Distance range: 1500m