Red. Machined from 6061 Billet Aluminum. Anodized protected. No tools needed. Wider contact area for a more stable prop. It acts as a heat sink and has built-in cooling ports that reduce the operating temperature for longer battery and trolling motor life. Made to fit most Minn Kota and Motorguide trolling motors. Comes in an assortment of colors to provide a sleek, matching aesthetic. O-ring dampens noise/vibration and secures nut. Designed and made in the U.S.A. Patent pending. Please Note: Will not work with Kipawa and Hydrilla Hacker Props.