Warranty issues and manufacturer restrictions might prevent us from shipping some products to certain geographical locations. In addition, Grommets shipped via UPS or Federal Express cannot be shipped to a P.O. Box; they must be sent to a street address. Regardless of the shipping method, some Grommets cannot be shipped to a P.O. Box, an APO address, an FPO address, or a DPO address. Check the Details on any Grommet page to view any shipping restrictions.