United Shield Active Shooter Level IV PST 650 Helmet 2 10inX12in Zeta6h Plates Black Small ASLIV-S-B. 06 certified Level IV polyethylene and ceramic ballistic plate ergonomically designed using proven technology affording the wearers excellent Single Hit Stand Alone protection against a range of high velocity threats. Specifications for United Shield Active Shooter Level IV PST 650 Helmet Zeta6h Plates: Manufacturer: United Shield Threat Level: Level IV Quantity: 1 Package Contents: United Shield Active Shooter Level IV PST 650 Helmet Zeta6h Plates United Shield ASLIV-S-B: Active Shooter Level IV PST 650 Helmet 2 10inX12in Zeta6h Plates Black Small