Ride the same wake as the pros. We worked with the engineers at MasterCraft to design this system so you know that it meets their high standards of quality. This package is no joke with 4 sacs that are designed to be installed on top of the factory ballast hard tanks. Over 2500 lbs. additional ballast... Enough said. NOTE: MUST PURCHASE FITTINGS SEPERATELY WITH PART# W715 PART# 558031 2 Custom Rear V-Drive Compartment Sac - 40 x 22 x 22 2 Custom Front Open Bow Sac (under seats) - 40 x 22 x 6 3 Custom Distribution Flow Valve 1 50' of 1" reinforced black bildge hose 3 Check Valve T-Assembly for venting 30 hose clamp all custom fittings (all preinstalled with PVC cement) PART# W715 2 Custom Rear V-Drive Compartment Sac - 40 x 22 x 22 2 Custom Front Open Bow Sac (under seats) - 40 x 22 x 6