2/24/2021 Update: US Mail is still running way behind (especially the Northeast & and now TX). If you need your diagram(s) in 5-6 days please select UPS at checkout. We have negotiated a flat rate of $9.95 per shipment. (Residential & Extended Area surcharges are included) East of the Mississippi should receive items in 2-4 business days or less, rest of continental US in 4-7 business days at most. US Mail options still available, but delivery may take longer (days or weeks) . Please don't think you'll be the exception and get US Mail in 2 days. You'll most likely be disappointed. Thank You for your support!