Shock absorber cylinder and some reservoirs
apply cold drawn precision tube, with inner roughness ranged Ra 0.2 to 0.4, and
straightness under 0.3/1000mm. Mechanical properties change is available
according to customer requirement.
Reservior and dust boot usually apply ID scarfing precision ERW tube, which enables large outside diameter, thin wall thickness, good dimension tolerance, smooth outer and inner weld seam, as to supersede cold rolled tube.
