The Bird Spider Sand Bag Base is an optional base used to weigh down bird spiders so they can stand alone. The Sand Bag Base attaches directly to the base of any size Bird Spider and comes with all necessary hardware. Each base weighs 8 lbs. and has eyelets around the outer ring for extra security. The Sandbag Base is ideal for boat canvas covers and other areas.
Here is a video demonstrating the Bird Spider Boat Base in action: