Designed for Jazzy Powerchairs **Must have the standard armrest as pictured in this listing for proper installation** This package includes a custom cup holder. It accommodates water bottles, cans, tumblers, and cups of various sizes. Installation is effortless: slide into the square metal mount under your armrest. You will need to use the screw already on the square mount to tighten it into place. If you need assistance or encounter any issues with one of our products, please don’t hesitate to contact us. We will do our best to ensure your satisfaction. We are continually developing new products, so stay tuned for upcoming releases.