Usage Tips:32mm Pool Winterizing Plug Rubber + Stainless Steel Swimming Pool Winter Expansion Plug with Screw 【Versatile Application】Designed as a pipe plug for winter pool maintenance,preventing pipe entry and protecting against freezing. Also useful for pressure testing and backflow prevention during equipment maintenance. 【Durable Construction】Made from high-quality rubber and stainless steel,ensuring stability and longevity. Cold-resistant design prevents slipping or shrinking,allowing for long-term use. 【Easy Installation】Simply screw the plug into the return water inlet to effectively protect your pool pipes from damage and potential freezing. 【Multipurpose Use】Suitable for above-ground and in-ground swimming pools,outdoor pools,kitchen and bathroom sinks,and small indoor pools. Can also be used as a pipe plug for connecting storage devices. 【Prevent Pipe Bursts】These threaded plugs for pool return pipes help prevent pipe bursts during harsh winter conditions,ensuring your pool system remains intact. Specifications: Material: rubber + stainless steel Size: large head diameter: 32mm,small head diameter: 27mm,applicable diameter: 32mm hole Package included: 1 x Pool Winterizing Plug