... All standard size can supply6)SIZE:56mm; Diameter 16mm7).High-quality and competitive price.8).Customized designs are welcomed.9). ... production Business Type:ManufacturerMain Products:steel ball,spring,screw,stamping part,Automatic lathes partOperational Address:No.7, Qinghu Road, Qinghutou ... Certificate:ISO9001:2008 Contract Manufacturing:Design service offered High quality metalhook, steel hook