We ship most orders UPS or FEDEX ground. Sometimes we must ship Fedex instead of UPS. If you order with a PO box, we will still ship the items to you, however, it wall take a few extra days to ship, as we need to bring the item(s) into our Texas warehouse to ship via USPS. We offer a 30 day money back guarantee on all unopened items. Return shipping to be paid by buyer. Any items that shipped from us with free shipping will have the shipping we paid to get the item to you deducted from any refund to you. Please contact us for an RMA (Return Merchandise Authorization) number and return instructions before returning any items. All items we list for sale are available at the time of the listing. From time to time, an item we sell may be back ordered or discontinued, if this happens we will provide you with a prompt refund. Thank you from ordering from Tweetys, the Leader in Recreation Vehicle Parts and Accessories!