Fly High Pro X Series Jumbo V-Drive Surf Sac Ballast Bag;

New, and improved, FATSAC/Fly High, Pro X Series Jumbo V-Drive Surf Sac - W719 EXV! *All of their 2018 W719 JUMBO SACS come with an EXTRA VALVE at the bottom end, STANDARD now! dimensions: 50 x 24 x 24 weight: 1100 lbs. / 500 kg. Will conform to fit and fill any rear V-Drive compartment to give you maximum weight. Also will conform to fit in other places and in other type boats.