1,Certificate NO/XK20-301-00218 safety cap 2,Icable standard/GB2811-89 3,Made of high quality engineering ABS Safety cap safety helmet miner safety cap safety helmet-BS-B (miner safety helmets) Applicable standard/GB2811-89Certificate No/XK20-301-00218UsageIt suit for coaling, tunnel workers.Main characteristics1,Made of high quality engineering ABS2,Inner size can be adjustable,comfortable