Features: Cherne 266035 Pillow-Style Muni-Ball Plug- 33", Urethane.Cherne's Pillow-Style Test-Ball and Muni-Ball plugs are great for blocking sewer flow and can also be used for sewer air testingMade from heavy-duty elastic urethane, these plugs are lightweight, flexible, chemical and petroleum-resistant, and will fit through small diameter openingsPillow-style plugs can be tethered with the attached tether bars, and will work in all types of pipe, including ductile iron sizesEquipped with a special 30' inflation hose, read-back line and gaugeA repair kit is available to fix small tears and puncturesMuni-Ball style plugs feature a bypass with threaded nipples on both ends