the present invention is a unitary piece block formed of polymers by a single injection molding step which are assembled into a recreational vehicle leveler . the invention ramp provides four sets of four connectors at a top of a floor plate , which are adapted to interlock in cavity structures formed within a cavity on the underside of the block . two adjacent blocks are secured together by applying to their top surfaces the securing cavity structure of an underside of a third such block . such blocks can be stacked in an interlocking manner to reduce storage space .