Available only in Quebec & Maritimes. Simple and straight-forward, JBM Flat Racks are an efficient, easy-to-use bale hauler. Sizes: 8-1/2' wide by 16', 18', 20' or 24' lengths. Available only in Quebec & Maritimes. Simple and straight-forward, JBM Flat Racks are an efficient, easy-to-use bale hauler. Sizes: 8-1/2' wide by 16', 18', 20' or 24' lengths. Available only in Quebec & Maritimes. Simple and straight-forward, JBM Flat Racks are an efficient, easy-to-use bale hauler. Sizes: 8-1/2' wide by 16', 18', 20' or 24' lengths.