Tpye (mm)	Straightness and flatness of working surface		Parallelism between working surface
	Precision grade ( μm)
	00	0	00	0
500 × 100 × 40	1.6	2.6	2.4	3.9
750 × 100 × 40	2.1	3.5	3.2	5.3
1000 × 120 × 40	3.0	5.0	4.5	7.5
1500 × 150 × 60	4.4	7.4	6.6	11.1
2000 × 200 × 80	5.4	10.0	8.1	13.5
3000 × 200 × 80	8	16	12	24