UWS TT-100-COMBO 100 Gallon Combo Aluminum Transfer Tank Offset Hinge is designed to fit tight against the front of the tank and still allow the lid to open without rubbing ; Not compatible with DEF Diesel Exhaust Fluid Patented fully foamed lid creates a rigid wall between outer aluminum layers to help prevent bending or warping Stainless steel paddle handle lock provides strength,security and long-term corrosion resistance.Commercial Grade Vented Cap and Mounting Flanges for proper ventilation of non-flammable liquids Connecting rod enclosure helps prevent box contents from bending or jamming the locking system Fully Welded One-Piece Tub is designed to support heavy loads, absorb tool drops into the tub and prevent leakage