Description:Features: 1) Widely used in kinds of gas springs, automobiles shock absorbers, cylinders, body-building instruments, motorcycles industry, and in the occasion where high accuracy, roughness and cleanness of the tube are required 2) Specifications: a) OD: Φ6-14,15-24, 24-33, 33-48, 48-65, 65-89, 89-108, 108-127, 127-220mm b) Thickness: 0.8-12mm 3) Quality carbon steel to cold rolling, to BK status, to nondestructive testing, to antirust oiling outside surface 4) Inner and outer walls of tube have high accuracy, excellent roughness (Ra=0.2-0.6) 5) Color of tube: bright white 6) Materials can be altered to meet customers\' requirements (carbon steel, alloy steel