Product DescriptionFeatures: The test plug is designed to sit on of the drain pipe with a neoprene gasket to create an airtight seal.The larger wing nut makes tightening and removal quick and painless.Metal panels are stronger and less likely to rust.4 inch size fit for most regular water pipes.Specification:Main material: Rubber+metalColor: As ShownSize: 11 x 9.6 x 7 cm/ 4 x 3.7 x 3 inchesSuitable for: Various materials 4 inch water pipePackage Contents:1 x pcs plumbing toolsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.