Great Sealing Performance: Made from quality rubber, this sewer test plug offers excellent airtightness and strong elasticity, ensuring reliable water blockage during repairs and tests. Quality & Resistant: Features outstanding wear resistance and anti-aging properties for long-term use in demanding environments. Versatile Application: Ideal for emergency pipe repairs, sewage pipeline maintenance, and water leakage detection; quickly blocks water flow in pipes of various diameters and positions. Efficient Operations: Expands rapidly when inflated to fill the entire pipe section; friction between the plug and pipe wall ensures a secure seal with clear pressure monitoring via the included matte air pressure ball. Complete Set & Convenient Size: Includes one inflatable plug and one air pressure ball, making it easy to handle for underground drainage or cleaning projects. Specification: Material: Rubber Size: 23cm x 19cm / 9.06 inch x 7.48 inch Package Includes: 1 x Sewer Test Plug 1 x Air Pressure Ball Note: Please allow slight measurement deviations of 1–2 cm / 0.39–0.79 inch due to manual measuring.