Form side and back enclosures for a shelving unit. Can also serve as uniform dividers within unit by passing through shelves from top to bottom. Compatible with Super Erecta Wire Shelving. Recommended spacing: every 6" (150mm) to 12" (305mm), depending upon shelf contents. Plated rods are shipped with 4 plated tabs per rod. Stainless steel rods come with 4 rust-proof tabs.