White colour rigid plastic tanks with threaded inspection porthole, with strenghtenine ribs above and botton of the tank, with already threaded holes to connect inlet of 1 1/2d. 38, outlet and vent fittings with thread of 3/8in to which can be applies fuel line terminals of d. 10-12-16, positioned on the verticle and above sides of the tank and also ready to tank on the above side an inspection hatch (BO2155)