We ship all of our genuine John Deere parts, including this John Deere Grass Mulching Attachment BM21890, five days per week. We ship primarily via UPS, USPS, FedEx and truck freight. Once your order leaves our warehouse, you will receive a tracking number via email. Most orders ship within 1-3 business days. If you have placed an order on the weekend, during a holiday or after 4pm EST during the week, we will begin processing your order during our next business day.