Straight Line 540-Pound Launch Pad Single Ballast Bag The Launch Pad 540lb ballast bag is great option for either a direct drive boat or a inboard/outboard boat. The additional ballast will pump up your wake. 20"H x 20"W x 50"L Heavy Duty 30 gauge PVC. Strong, electronically welded seams. Three Launch Pad Link valves for clean and easy filling and draining of your ballast bag. One traditional valve for compatibility with older pumps. Weight label around valve for easy size identification.