Arrow FDN109 Storage Shed with Floor Base Kit for 8'x8', 10'x8' & 10'x9' Arrow sheds Fits Arrow and storboss 8' by 8', 10' by 8' and 10' by 9' buildings (not compatible with buildings with Swing doors) Made of durable HDG Steel Self squares your storage building prior to completing assembly Able to be finished with the flooring material of your choice; plywood, gravel or concrete Can be used as a form for pouring concrete