Squareness measuring instruments

Squareness according to DIN875.Holes for reduce the weight and easy handle. Black granite material. The four outside flats are worked parallel and rectangular to each other. Type(mm) Squareness between abjacent Measuring surfaces Straightness of measuring Surface Parallelism between opposite Measuring surface Precision grade(μm) 000000000160*160 240.810724200*200 240.910824250*250 2.24.5122.24.5315*315 2.65.21.122.24.5400*400 361.32.636500*500 3.571.533.57All the standard size are in store and the special size or design can be made as your requirement. As a manufacturer,we will supply you the most favourable price and top-quality service.Your inquiry is highly appreciated.