Sixteen gallons, 27 lb on the shipping scale. The B215 is the kind of tank you buy for a boat where every installation is done lying on your side with one arm through an access hole - light enough to maneuver into position solo, sized for the fresh water system of a trailer sailer, a small powerboat, or a cuddy that finally deserves better than jerry cans.
Jerry cans are actually the right comparison. Sixteen gallons is a stack of portable jugs you no longer have to lift, pour, or stow - plumbed instead into a proper system from a rotomolded, FDA-compliant polyethylene shell that is rated for potable water and molded without a seam to leak. Full, it carries about 133 lb at 8.34 lb per gallon, a load a modest shelf handles if the tank bears flat and the straps reach structure.
The fittings are yours to place. Print the drawing below and mark the fill, vent, and pickup where the hose runs work in your boat, or lay them out on the on-page fitting planner; Ronco spin-welds or thread-installs to your marks before shipping. The shop has run this made-to-order routine in Tustin, California since 1974, on small tanks and giant ones alike.
More small-boat sizes are gathered in the boat tank category, and the complete range is on the Ronco Plastics hub. OneSource Plastics is an authorized Ronco Plastics dealer.
Technical drawing: download the Ronco Plastics B215 dimensional drawing - print it to plan your install and mark exactly where you want fittings located; Ronco installs spin-weld or threaded fittings to your marked spec.