Adapter plug designed for converting a round 15-amp male plug to a 30-amp female plug. Allows for the safe and reliable connection of electrical devices. Durable construction for long-lasting performance. Suitable for use in RVs, boats, and other outdoor settings. Provides a convenient solution for power compatibility. Since 1981, Valterra Products, has been a leading supplier of brand name product lines to the RV, pool and spa, and plumbing industries.