Buffer Projection Gauge Specification (1) Accuracy +/- 1.0 Mm. (2) Range 570 Mm To 665 Mm (3) Material To Be Supplied Along With Calibration Certificate By Nabl Approved Lab And Elegantly Finished W Ell Padded Wooden Storing And Transportation Box With Working Manual (4) Acceptable Make/Brand - Pie Or Prasad Engineering Or Ganapathy - Model: Bpg-1 Only. [ Warranty Period: 30 Months After The Date Of Del Very ] ]