Placed order for 5 o-rings on December 7. Shipment notification received on December 11. They used DHL for shipment. DHL site says the package arrived on December 13. Estimated arrival is December 20. So, four days to process the order, two days to move the order to the shipper, seven days for delivery, and, by the way, They could have put the order in an envelope and shipped via USPS (which DHL is going to use anyway). Very inefficient processing and expensive shipping expense. Won't be using Filters Fast again.