Bull frog's rust blocker emitter shield protects all metal surfaces in larger enclosed spaces from rust and corrosion for a full year by forming an invisible, protective electrochemical layer.It won't harm plastics, elastomers or painted surfaces and is both environmentally and user safe.The shield is easy to hang in a gun cabinet, storage locker, tool chest, etc.Protects up to 100 feet,Type: Rust InhibitorSize: Protects 100 cu. ft.Quantity: 1Material: VpClsProtects: Against Rust and CorrosionSuitable For: MetalEco-friendly: YesHazair: Yes