This Attwood Wedge Base Plate is a durable and reliable addition to any boat seat. With a round shape and a 9-inch diameter, it provides a sturdy base for the seat to rest on. Made in the United States, this boat seat base plate is built to last and withstand the elements. The silver color adds a sleek touch to any boat interior. It is compatible with various boat models and types, making it a versatile option for any boater.