Denfense Objects:Organic Gas,acid Gas,ammonia,hydrogenOrigin:Mainland Certification:CeUsage:Work Silicone Material:Made Of Silicone And Thermoplastic Elastomer Material With Silicone Surface Veneer For Added Comfort And Durability. Compatible With Industry Standard 40mm Gas Filter Canister. Nuclear Radiation Respirator Is Soft, Comfortable, Durable, , Healthy And Easy To Clean, Fits Most Face ShapesFull Face Cover:Lightweight And Balanced Full-face Nuclear Radiation Respirator Design And Optimal Seal Provide All-day Worker Comfort And Durability, Making It A Good Choice For Industry Or Fields. Large Lenses Provide A Wide Field Of View To Enhance Productivity And Provide Additional Protection For Your Eyes With A Wider Field Of VisionEfficient Application:Compatible With Industry Standard 40mm Gas Filter , The Full Face Shield Blocks A Variety Of Substances. Ideal For Nuclear Radiation Filtration Of Small Dust, Fog, Metal Fumes Or Paint Sprays. Suitable For Spraying, Welding, Agricultural Operations, Polishing, , Mining, Environmental Technology Protection, Etc.