the size range(I.D): 63mm~250mm

The tolerance of O.D:  According to DIN 2391( EN10305-1) 

I.D: ISO H8.

Roughness:0.4 microns(max), average: less than 0.2 micron

The max length: 9m.

Straightness: 0.8/1000 or better.  

Delivery condition: ST52 BKS, E355 SR.

Certificate: EN10204 3.1

Steel grade: ST 45,ST 52, E355,SAE1026,SAE1045 STKM13C and etc.