55mm*45mm*40mm, outer diameter tolerance +-0.05mm, inner diameter tolerance +-0.05mm, height tolerance +-0.05mm. The ovality of the inner and outer diameters is 0.07mm. Within 0.3mm of wall thickness tolerance (if the wall thickness needs high-precision tolerance, it can be machined by turning)
Outer diameter 30mm-60mm, various materials of precision steel pipe cutting materials and turning products.