Pool Stoppers: You can get 2 pieces of black rubber expansion stoppers, available in 2 sizes, 1.5 and 2, for your daily use and replacement needs, helping you protect your pool in cold winters Wide range of applications: This pool plug is used as a pipe plug, which can be returned in winter to prevent entry into the pipeline; this expansion plug also has other uses, such as testing the pressure of the pool during equipment maintenance and preventing flow from the pool Stable performance: The pool winter plugs are made of rubber, which is stable and firm; and this pool thread return plug is also well-made, cold-resistant, non-slip and non-shrinking; you can use these plugs for a long time PRACTICAL USE: These expandable rubber stoppers prevent access to pipes and protect your pool plumbing; all you need to do is screw the stopper into stagnant water; threaded swimming pool return pipe plugs help prevent pipes from breaking Bring convenience to your daily life: these pool interceptor plugs can be used as pipe plugs to plug storage, threaded pool return pipe plugs are suitable for winter plugs on the ground and in swimming pools in winter; you can use them in outdoor swimming pools, kitchen and bathroom sinks and use them in small indoor pools