Description: 【Great Sealing Performance】: Sewer Test Plug is made from quality rubber, this sewer test plug offers great airtightness and strong elastic, ensuring reliable water blockage during repairs and tests 【Quality & Resistant】: Features outstanding wear resistance, and anti aging properties for long time to use in demanding environments 【Versatile Application】: Ideal for emergency pipe repairs, sewage pipeline maintenance, and water leakage detection; quickly blocks water flow in hoses of various diameters and positions 【Efficient Operations】: Expands rapidly when inflated to fill the entire pipe section; frictions between the plug and pipe wall ensures a secure seal with clear pressure monitors via the included matte air pressure ball 【Complete Set & Convenient Size】: Includes 1 inflatable plug and 1 air pressure ball, make it easy to handle for underground drainage or cleaning projects Specification: Material: Rubber Size Chart:12cmx4.5cm/4.72inchx1.77inch Package Includes: 1 Sewer Test Plug 1 Air Pressure Ball Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.