Select options Germinator N6 (price per row) $90.00 – $200.00 Limited Quantities Available Wheels sold per row and include a set of 2. Unlike the typical poly-wheels that may wear out after only one season, our closing wheels are made with Nylon 6. Nicknamed “plastic steel” Nylon 6 is ultra-durable at a lower price-point. Nylon 6 is also the same material Michigan Transmission uses to manufacture transmission gears. First Generation wheels recommended for low acreage only.