RUBBER CONICAL PLUG: Rubber compression plug for winterizing pools, rubber pool winterizing plugs are a simple solution that prevents your pool from serious damage. Effective Protection: The pool winterizing plug can protect your pool from the harsh winter season. A simple solution for winterizing rubber expansion pipe pump hole plug fittings prevents your pool from serious damage. Multi-Purpose: Expansion plugs have other uses, such as strength testing pool lines or other leak detection methods, or stopping pool water from flowing during equipment repairs. Winterized rubber pool plugs for swimming pools prevent freezing, expansion water leaks, and broken pipes. Material: The rubber pool plugs are made of high-quality rubber, which has maximum scalability and ensures waterproofness and corrosion resistance. The rubber compression body is small in size and easy to carry. Easy to install: The winter pool plugs are easy to install and use, operational in seconds. The scupper plugs can be used to plug the scupper holes of your swimming pool. Shipping quantity: 1 piece