Specification AgeRangeDescription : Adult Brand : Hardware Helpers BulletPoint1 : Dimensions108mm x50mm / 4.25 X 2 in. Thickness of the lens: 1mm / 0.04in.Made of Premium Polycarbonate. BulletPoint2 : Before installing on the welding helmet, be sure to tear off the protective film on both sides of the surface. BulletPoint3 : Fit for standard 3/11 welding helmet lens filter shade BulletPoint4 : In order to make your helmet more suitable for welding, change lens cap regularly to ensure the best working condition, cleaning and protection. BulletPoint5 : Package include 20 pcs of welding helmet lens covers. CareInstructions : Hand Wash Only Color : 28"x8" Without Knee Pads--2*knee Boards Configuration : Refer to description Department : Unisex Department1 : Unisex Baby Department2 : baby-boys ExternallyAssignedProductIdentifier : 4611786244692 ExternallyAssignedProductIdentifier1 : 0029612040402 ExternallyAssignedProductIdentifier2 : 029612040402 FabricType : 75% cotton 25% spandex FdaDeviceClassification : i FdaIndicationOfUse : otc_and_rx FdaInstructionsForUseType : consumer FdaLabelType : consumer FdaPremarketApprovalNumber510k : Refer to description FdaPremarketApprovalNumberPma : Refer to description FitType : Standard Flavor : Fig FormFactor : Shell GolfClubFlex : Regular HandOrientation : Refer to description ImportDesignation : Imported IncludedComponents : Refer to description ItemDisplayDimensions_Length : 8.86 inches ItemDisplayDimensions_Width : 7.87 inches ItemDisplayWeight : 0.19 pounds ItemName : Knee Pads - 2 Pair Lot ItemPackageDimensions_Height : 15.6 centimeters ItemPackageDimensions_Length : 1.8 centimeters ItemPackageDimensions_Width : 11.1 centimeters ItemPackageQuantity : 1 ItemShape : Refer to description ItemTypeKeyword : work-wear-kneepads Manufacturer : Kingdosy Material : Polycarbonate (PC) ModelName : Generic-QPA0G6K8S8ML0GOFR ModelNumber : 2x4.25 NumberOfItems : 1 PartNumber : 040-400 Pattern : Refer to description ProductDescription : Make your helmet more comfortable for welding, the lens covers should be replaced when needed.