FatSac V-Drive 400 lbs. Wake Surf Ballast BagThe FatSac Pro X Series V-Drive Wake Surf Ballast Bag fits perfectly in the compartment of your v-drive boat to produce a nice wake for surfing. Try combining this sac with the Pro X Series Fat Brick to help you control the shape of your wake. Will also conform to fit in other places and in other type boats.Dimensions: 42" L x 16" H x 16" WColor: Gray