This is a new Hobie Baby Bob Mast Float part # 30115 and we include the Hobie 14/16 Attachment kit part # 30116. The Baby Bob was designed by the Hobie Cat team to offer the safety and security of mast head flotation while limiting the resistance (drag) through the air. If you capsize, the Hobie mast float can give you the time you need to prepare to right the boat without the worry of going turtle (the mast straight down). This also helps prevent damage to your rig and sails that can be caused if the mast comes in contact with the bottom when capsized. This float is standard on the Hobie Wave. Great for Hobie 14 and 16 as well as many other boats with mast castings capable of bolting on in a similar fashion. The Bob can be modified by you to fit many other small sailboats including Hunter and Capri boats. Displaces 32 pounds of water and measures 1/2 cubic foot in volume. Bracket mounting allows easy removal for racing or trailering. Includes brackets and fasteners. Note: will not fit Hobie 18 or 21 you need a different product called the Universal Mama Bob which we have listed on our store also.