1000 oz Silver bar .999 fine Comex approved The 1000 oz Comex Silver Bar is a bar which can be used to satisfy demand for large deliverable quantities of silver bullion traded on the Commodity Futures Trading Exchange. There are a number of authorized refiners (Approved Assayers) and include Johnson Matthey, Argor S.A., Royal Canadian Mint and Metalor: for a complete list visit the CME Group. The 1000 oz Comex Silver Bar is a handy size for industrial purposes and can be popular with large silver bullion investors