Granite Straight edge

Granite Straight edge Cast Iron Leveling Straight Edge Bridge Type Cast Iron Measuring Tools MATERIAL IS CHOOSE BLACK GRANITE ,TWO NARROW EDGE IS LAPPING WITH ACCURACY Pecification (mm) Flatness of working surfacellelism of opposite surface Squareness between working surface Tolerance of h.w.between a matched pair Precision grade (um) 00 0 00 0 00 0 160x25x16 1.5 3 20 40 1.5 3 250x40x25 2 4 30 60 2 4 400x63x40 4 8 40 80 4 8 630x100x63 6 12 50 100 6 12