Boni Bottle Bay REPLACEMENT Hardboard Back Extra or replacement hardboard back panelOrder back panel Joiner separately. One joiner for every two backs ordered.(2-REQUIRED per bay)White Powder Coat Finish ProductPriceQuantity Boni Hardboard Back,48W,40H,White (121-14-4840) $51.01 Boni Hardboard Back,36W,40H,White (121-14-3640) $45.06 Boni Hardboard Back,24W,40H,White (121-14-2440) $35.95 Boni Hardboard Back,14W,40H,White (121-14-1540) $29.72 Boni Hardboard Back,30W,40H,White (121-14-3040) $39.73 Your Cart Related Products Boni Back Panel Joiner