1/2 pound of 400F fine tumbling and lapping silicon carbide grit. A high quality grit well suited to rock tumbling and lapping. A great grit for the third stage of tumbling agate, jasper, and other hard lapidary materials. This grit lot is shipped FREE to all USA ZIP codes in a sealed plastic bag in a USPS 1st class padded envelope. The shipping weight is approximately 9 ounces. Please e-mail me for exact shipping charge for non USA shipment.