... Fetures: with hologrpahic secuirty teches Metal oil barrel cover, Zip top cover, oil bottle cover1.Metallic oil tank cover- (Aluminum, Zincum…)2. ... aluminum, zincum..), middle of cover the polypropylene and linear high-voltage, under cover of EVA and low density polyethylene ... The product using one-time zip-top(ring-pull) high anti-counterfeiting technology, technology is mature, excellent security, ...