The J.W. Speaker Model 234 4 Inch Round Plastic Mounting Flange is a practical and eco-friendly product designed to fit a 4 1/2 inch panel hole. Made with a rubber housing material, this flange is durable and long-lasting. It is sold individually and fits most J.W. Speaker 234 models. With its reliable construction and made in the U.S.A., this plastic mounting flange is a great choice for those looking for a high-quality and environmentally conscious solution.