Our rigid fuel tanks for pleasure boating are made of cross-linked polyethylene of light color that makes them more visible inside the boat. Currently they are produced in the following sizes: 36, 40, 55, 60, 70, 77, 87, 91, 94, 95, 107, 118, 133, 140, 141, 160, 185, 191, 198, 204, 207, 214, 215, 257, 261, 270, 271, 277, 332L, 332P, 336, 370, 387, 407, 444DX, 444SX, 450, 555, 705, 767 litres (SEE ENCLOSED FILE FOR DIMENSIONS).