3-inch (about 7.6 cm) sewer water pipe plug: Includes 1 piece of pre-assembled sewer cleaning cover; designed for routine maintenance use; threaded design helps prevent pipe damage and protects sinks and plumbing systems. Stable performance: Constructed from high-quality rubber and metal for maximum expansion and a secure seal; features a stainless steel wing nut for enhanced reliability, stability, and durability. Easy to use: Threaded rubber plug prevents water ingress into pipes; simply screw into drain and return inlets after cleaning—no tools required; intuitive operation and secure fit. Wide usage: Suitable for sealing pipes during winterization; also used for pressure testing in pool equipment maintenance and preventing water outflow. Practical application: Compatible with various plumbing systems including outdoor swimming pools, kitchen sinks, bathroom sinks, and small indoor pools. Includes: 1 x Sewer Water Pipe Plug