... plastic Fetures: with hologrpahic secuirty teches Metal oil barrel cover, Zip top cover, oil bottle cover1.Metallic oil tank cover- (Aluminum, ... .OEM is welcomed 1.Anti-counterfeiting cover & engine oil zip-top cover. 2. Size #49 special for 10L oil barrel ... and low density polyethylene material. The product using one-time zip-top(ring-pull) high anti-counterfeiting technology, technology is mature, ...