Ceramic Square Ruler mere nke Al2O3 nwere ihu ọma isii dị ka DIN Standard si dị.The flatness, straightness, perpendicular na parallelism nwere ike iru 0.001mm.Ceramic Square nwere akụrụngwa anụ ahụ ka mma, nke nwere ike idobe oke nkenke ogologo oge, ezigbo mgbochi iyi na ịdị arọ.Ntụle seramiiki dị elu nke mere ọnụ ahịa ya dị elu karịa ihe nlere granite na ngwa igwe.