Elliptical tank design prevents chemicals from building up in 'dead spots'. Square tanks with interior ledges can lead to misapplication or residual chemicals left in the tank after the spray application. The tank incorporates a 16" side-offset fill well for easy access when loading chemicals. Durable polyethylene material won't crack, dent, rust, chip or peel. Three, 30-degree, side-mounted, agitation nozzles continuously 'roll' the tanks contents. Agitation nozzles are serviceable from outside of the spray tank.