Norwesco 325 Gallon Truck Bed Tank, part# 40160, is a liquid transportation tank that fits in most standard truck beds. It's primary used for the transportation of water, chemicals, and fertilizers (specific gravity rating of 1.5). This plastic truck bed tank was created with FDA approved virgin polyethylene resin that is food-grade and safe for drinking water. The tank complies with the U.S. Food and Drug Administration regulation 21 CFR 177.1520 (1) 3.1 and 3.2 for the storage of potable water.