I have the new Fat Sack Heavy Duty Series. I just got them in, so I don't have pictures, yet. They are 58LX18WX14H and have three outlets that are elbows - no waterbed fittings. These are made out of the material that some liferafts and inflatable boats are made of.
Each sack roughly calcuates to about 540 lbs of water, although I have not put one on the scale, yet.
Each sack comes with three plugs and three hose bibbs for connections. You supply the hose clamps, hose, and pump(s).
Price, shipped to your door in CONUS - $150. Don't like it - 30 day no question return policy. Simply let me know and I will send the call tag and refund your price less $15 shipping (my cost of shipping to you the first time). The return shipping is on me.
www.boarditup.com rider@boarditup.com