For inspecting the parallelism for work -pieces also for replacing the working blocks at the same height when required ,Supplied in matched pairs .we make it according to flatness of working surface and parallelism of opposite surface ,squareness between working surface ...
For inspection the coaxality Symmetry and shifting of revolution parts,Generally supply by pair if need single pc please adv.when order ,we have the manufacturing ability of make it with the good management system,reliable quality assurance system and advanced machinery ...