Fabricated of alloy 18-8 stainless steel , type 304; brackets shall be 18 gauge, shelf has 1/2" lip on all 4 sides. Front lip is hemmed under for safety. Exposed surfaces shall be # 4 satin finish and protected during shipment with PVC film. 3 9/16" high mounting brackets are welded to under side of shelf. Spec sheet available with number of brackets, spacing etc. Number of brackets on 12 to 24" wide self is 2; 30 to 42" wide- 3; 48" wide- 4. For custom shelves please fax or email a sketch.