honed steel tube for cylinder

1. cold-drawn steel tube of high-precision,
a. Material: 20#, 45#, 16Mn, 25Mn, 27SiMn,
b. Polishing: to 0.8Ra Max,
c. precision of size: H9-H11,
d. Cylinder ID:  from 40mm diameter up to 320mm diameter,
e. Length: 13000mm maximum,
f. Thickness: 2.5mm diameter up to 55mm diameter,

2. honed steel tube of high-precision,
a. Material: 20#, 45#, 16Mn, 25Mn, 27SiMn,
b. Polishing: to 0.4Ra Max,
c. precision of size: H8-H9,
d. Cylinder ID:  from 40mm diameter up to 800mm diameter,
e. Length: 13000mm maximum,
f. Thickness: 2.5mm diameter up to 55mm diameter,