FastRak Extra Shelf with Wire Mesh DeckingFastRak heavy duty bulk storage shelving has extra shelves available to add storage space to or replace worn out shelves on existing units including these FastRak Extra Shelves with Wire Mesh Decking. Wire mesh openings are 2" x 4" and the wire thickness is 6 gauge (4. 5mm) designed for industrial applications. Decks include 16 gauge supports for added capacity.