Abstract: Disclosed is a device for supporting and spacing the tubes within a heat exchanger comprised of a plurality of V-shaped stiff wire rods. Each of the V-shaped wire rods includes a pair of leg portions and a concave intermediate section. The inside radius of the concave intermediate section is substantially equivalent to one-half of the tube outside diameter. Six of the V-shaped stiff wire rods are affixed to one another to form a spacer having a substantially hexagonal opening wherein each side of the hexagonal opening is one of the concave intermediate sections. At each apex of the substantially hexagonal opening there extends radially outward legs from two of abutting V-shaped stiff wire rods.Thus formed, the spacer of the present invention provides a structurally sound tube supporting device while limiting the obstruction to flow of shell side process fluid.