4" Gridwall Hook. The white 4" metal gridwall hook measures 1/4" diameter. Metal gridwall hooks fit any of our 3" on center standard gridwall panels and slatgrid panels. The grid hook has a white finish. Hang merchandise neatly and organized with the White 4" Gridwall Hook. Please call for a personalized price quote on 15 or more cases of white 4" gridwall hooks. Note: Sale price limited to quantity on hand. In stock.