Specifications: Part Manufacturer: Attwood Part Number: 828662 UPC: 022697828668 Model: Swivl-Eze Material: Aluminum Color: Silver / Black Overall Dimensions: 13" L x 7 1/8" W x 5 1/8" H Mounts: (1) 2 5/8" ID Hole Sold as seen in pictures. Customers please note every computer shows colors differently. All measurements are approximate. Hardware and instruction / installation manual not included.