High density polyethylene plastic. Complete, with inspection porthole with cap, air-vent terminal and fuel pick-up terminal, and is ready to take a fuel sender and a 1/4 terminal for second pick-up or diesel return. Suitable for acids and fuels. Option: 180ll tanks, LEVEL SENDER S5-300mm: N/Ref: 118158 0-190 Ohm, N/Ref: 118194 240-30 Ohm. 210 and 255ll tanks, LEVEL SENDER S5-250mm - N/Ref: 118157 0-190 Ohm - N/Ref: 118196 240-30 Ohm