A more economical version of Square Stackable allows users to reduce costs further and eliminate unnecessary product features and components. Standard Square Stackable is built to last at a price that makes sense. Two-way forklift entry and pallet jack entry base also available in forklift safety channel design. Standard Square Stackable Only. Stacking alignment ribs allow tanks to be stacked securely two to three units high, depending on weight of material and size of tank. Standard 2" port ball valve with secondary seal provides safe, complete drainage. One 2" replaceable bung opening for top draw tube installation or pressure/vacuum relief vent placement. Standard Square Stackable Only. 100% F.D.A. and U.S.D.A. approved, polyethylene construction resists corrosion and environmental stress, and provides superior impact strength. Premium Square Stackable Specifications   Square Stackable Options Capacity Tare Weight Length Width Height   Molded-in company Logos for proprietary information. Stacked discharge systems allow top tank to gravity-feed bottom tank. Heat and insulation blankets for temperature-sensitive applications. Cleaning head assembly system. Food grade valve material constructions Top draw tube assemblies Pressure/Vacuum relief devices UV "black out" pigment Alternative gasket, valve and fitting material constructions Ultra-pure fitting connection points Micro Matic, GPI & Scienco pump mount adapters. Placard/document holders. 330 gals 240 lbs 45" 45" 59" 275 gals 215 lbs 45" 45" 51.5" 220 gals 168 lbs 45" 45" 44" 120 gals 166 lbs 45" 45" 32" Test pressure rating: 14.7 P.S.I.G Material weight rating: 1.9 SPGR Stacking capacity: 2-3 units (depending on container size, weight, & temperature) Patent #4,847,028 Other patent pending