Quick Ship - SmartWall Shelf Support, single, for 18 in deep shelf, Metroseal 3 epoxy-coated corrosion-resistant finish with Microbanr antimicrobial protection, actual dimensions (DxWxH 20-9/16 in x 1-1/2 in x 8-3/16 in ) compatible with Super Erectar wire & solid shelves, MetroMaxr Q, & MetroMaxr i (2) required per shelf