Improved tubular positive electrode means for use in a lead-acid storage battery, said electrode means including a grid structure consisting of a top bar, a lug portion extending from one side thereof, and spaced apart spine portions extending outwardly from an opposite side thereof, said top bar presenting shaped spaced apart surfaces of a predetermined configuration, a plastic grid complement member for selectively enclosing portions of the said grid structure, said grid complement being formed with spaced apart angularly displaceable side portions which are selectively self-registering with the predetermined shaped surfaces of the grid structure when these components are in assembled relationship with one another.