Specification Brand : uxcell BulletPoint1 : Country of Manufacture: CHINA; Material: PVC BulletPoint2 : Net Weight: 6g; Package Content: 20pcs x Vinyl Thread Protector BulletPoint3 : Main Color: Black; Inner Diameter: 4mm / 0.16" BulletPoint4 : Inner Length: 15(+/-2)mm / 0.59"(+/-0.08'') BulletPoint5 : Overall Size: 16 x 5mm / 0.63" x 0.2" (L*D) Color : Black ConnectorType : Cap ExteriorFinish : Black ExternallyAssignedProductIdentifier1 : 0604267573590 ExternallyAssignedProductIdentifier2 : 604267573590 ItemName : uxcell 20pcs 4mm Inner Dia PVC Flexible Vinyl Cap Screw Thread Protector Cover Black ItemPackageDimensions_Height : 0.39 inches ItemPackageDimensions_Length : 5.12 inches ItemPackageDimensions_Width : 3.94 inches ItemPackageQuantity : 20 ItemShape : Round ItemTypeKeyword : luer-cap-fittings Manufacturer : uxcell Material : PVC Material1 : Polyvinyl Chloride Material2 : Vinyl ModelNumber : a17112000ux0210 NumberOfItems : 30 NumberOfPieces : 20 PartNumber : a17112000ux0210 ProductDescription : Used for protecting screw thread point. Simply slide over the threaded end of the screw or bolt, also easy to take off. The flexible vinyl material stretches over the threads to provide a tight seal, cushions the threads against damage. Applications include: protection during transport, protection against liquids or dirt.