RDS Below Deck 18 Gallon Aluminum Fuel TankSpecial Order - Ships When Available. Contact customer service for more information on Special Order items.RDS has been a leading provider of custom aluminum fuel tanks for over 50 years. They are committed to the highest standards. The RDS Fuel Tank is a permanent below deck fuel tank that has been manufactured and tested to US Coast Guard and NMMA standards.Each RDS Fuel Tank is custom-made with 5052 aluminum alloy and 100% pressure tested to ensure it can withstand constant motion and maintain proper pressure. Each below deck tank is manufactured with electrical sending units along with removable vent plugs and comes with mounting brackets to safely secure the fuel tank. These tanks are safe to use with both gasoline and diesel.Features: Dimensions (L x W x H): 36 1/2" x 16 3/8" x 7"; Side Corners are radius bent, not welded; All tanks have 1/4" NPT pickup, 1 1/2" fill, and 1/2" vent fittings; Add 3" to height for fittings; Gasoline only. No return fitting for diesel fuel; Above Deck Tanks have vented caps with gauge units; Below Deck Tanks have electrical sending units and removable vent plugs; StartFragmentISO 9001:2000 compliant; Pressure tested at 3psi under 33CFR ; Meets ABYC & NMMA regulations ; ISO 10088 specificationsEndFragment; This is a special order item and cannot be returned.