Specs:
1 Replace Leica GRZ101
2 Prism constant: +30mm
3 1 piece of Leica GRZ101 360 degree prism held by two Metal pieces: one with a 1/4 inch female thread; one with a 1/4 inch male thread
4 8' round bubble level fixed to a metal base
5 4*30cm aluminium alloy rods . These rods can be applied to both GRZ101 and GMP111 system, carrying with strong canvas bag;
6 A hook-end for replacement. Attach it to the rods. so the prism can be hung from top surface