Specification Brand : uxcell BulletPoint : Made in Taiwan BulletPoint1 : Product Name: Flat Washer; Material: Plastic BulletPoint2 : Weight: 21g; Package Content: 200(+/-2%)pcs x Flat Washer BulletPoint3 : Main Color: Black; Outer Dia: 10mm / 0.4" BulletPoint4 : Thickness: 1mm / 0.04" BulletPoint5 : Inner Diameter: 4mm / 0.16" Color : Black CustomerPackageType : 1 ExteriorFinish : Zinc ExternallyAssignedProductIdentifier1 : 709874065121 ExternallyAssignedProductIdentifier2 : 0709874065121 ExternallyAssignedProductIdentifier3 : 00008236142785 ItemName : uxcell M4x10mmx1mm Plastic Round Flat Washer Gasket Spacer Seal Ring Black 200pcs ItemPackageDimensions_Height : 13.3 centimeters ItemPackageDimensions_Length : 0.8 centimeters ItemPackageDimensions_Width : 9.8 centimeters ItemPackageQuantity : 1 ItemShape : Shape ItemTypeKeyword : flat-washers Manufacturer : uxcell Material : Plastic MetalType : Alloy Steel ModelNumber : SYNCTEA047326 NumberOfItems : 20 NumberOfPieces : 200 PackageLevel : unit PartNumber : a16051100ux0975 ProductDescription : Washers are normally used to distribute loads of threaded bolts, screws and nuts evenly as the fastener is tightened. Intended for the general use under the head of a bolt or nut in order to provide a smooth-bearing surface.