... spools 2.ISO9001:2008 3.sustainable use for several years 500mm packing material reels plastic reels Our Company Advantage:1.Established ... .We have another two kinds of standard 500mm reels, size as below:flange dia. 500mm, barrel dia. 250mm, traverse 250mm, width 300mm ... , hole dia. 56mm, flange thickness 20mm ,4 bolts flange dia. 500mm, barrel dia. 250mm, traverse 250mm, width 300mm, hole dia. 56mm ...