Upgrade your boating experience with Millennium Marine's Universal Cup Holder, specially designed for Millennium Marine Boat Seats. This versatile accessory fits multiple applications, ensuring convenience on every journey.FeaturesSpecial Designed For Millennium Marine Boat Seats but will fit multiple applications.Comes with mounting hardware to fit round or square tubing that is vertical or horizontal from "3/4 - "1 A 1/2 inches.Fits all Millennium Marine seat with straps or cablesCup holder can move from front to backFit on Millennium R-100 rod holdersCup holder sits level on the Millennium Boat seatFits either side of the seat.