WeedRoller packages come standard with three 7-foot lake bottom rollers. If you're looking for more coverage, additional 7 foot tubes are available. A new 7-foot tube with the flex coupler retails for $575.
WeedRoller Pro Tube
7-Ft aluminum tube with a flex coupler, allowing it to attach to an existing tube, and also to allow the tubing to flex at the joint and contour better with the lake bottom.