J-Base for Windex® 15 Wind Vane
J-Base™ allows for side, top or front mounting on most masts, dinghies and big boats alike. J-Base™ is made of glass-filled polycarbonate and is 2" (51mm) long. It includes a stainless steel set screw and two #10 self-tapping screws. It reduces overall weight by 15 grams when substituted for the standard Windex® 15 mounting base.