Bend your own high tunnel for extending your season or for overwintering. Separate benders are designed to create either a 12' wide Quonset-shaped high tunnel or a 14' wide Gothic-shaped high tunnel. Build fixed or moveable structures of either size to meet your own specific needs. Some of the materials for these structures can be purchased from Johnny's and the rest can be sourced locally. Instruction manuals and cost calculators with a parts list can be downloaded from each of the individual bender product pages to help you in your decision making.