chair swivel 1) ISO9001-2008 2) customers' design or sample welcome. 3)delivery timely, good quality,competitive price chair swivel1) materialsteel,stainless steel,and other metal material2) high quality control system,3)surface treatment:powder coated,galvanize,sand coated,etc.4)OEM order are welcome.5)various stamping machine6)professional stamping tooling design.