Fly High Pro X Series Nautique Wedge Ballast Sacs Fly High Pro X Series Nautique Wedge Sacs (set) - These sacs are custom made to fit the compartments of the newer Correct Craft V-Drive Boats, but could be used in any boat. They tip the scale at 400 lbs. each. These sacs have a bit longer lower profile than the standard v-drive fat sacs. Add some Air to your Air Nautique!