Type (mm)	Squareness between Adjacent measuring surfaces		Straightness of measuring Surface		Parallelism between Opposite measuring surfaces
	Precision grade (μm)
	00	0	00	0	00	0
160 × 160	2	4	0. 8	1. 7	2	4
200 × 200	2	4	0. 9	1. 8	2	4
250 × 250	2. 2	4. 5	1	2	2. 2	4. 5
300 × 300	2. 6	5. 2	1. 1	2. 3	2. 6	5. 5
400 × 400	3	6	1. 3	2. 6	3	6
500 × 500	3. 5	7	1. 5	3	3. 5	7