Quickly find plumbing leaks with these dye testing cones - 6 Pack includes 5 closed cones and 1 open cone. These cones will fit into most standard size plumbing not to exceed 2". The patented design is made of durable vinyl and will last a lifetime of use. Included are six quick plugs with one having the reducer hole hose and funnel. The 6 units are stackable taking up little space in your tool box. The size is good for testing return pipes up to 2" including dual bottom drains.