CHROME LEDGE FOR SOLID SHELVES SNAPS ONTO PERIMETER OF SHELF PROVIDING 4""H RETAINING LEDGE. IF HIGHER LEDGE IS REQUIRED STACK FOR 8"" 12"" ETC. CHROME OVER NICKEL ELECTRO PLATING CREATES A BRILLIANT HIGH GLOSS FINISH. EASY ASSEMBLY. LIMITED ONE YEAR WARRANTY IN DRY APPLICATION AND USAGE. NSF APPROVED DRY USE. INCLUDES 1 SHELF LEDGE.