Dear Sir, We are minerals company, have been exporting vermiculite, pumice stone, perlite, zeolite, pebble and board etc., for around ten years, so if any requests about it, pls contact us, we are sure we can quote you a best price and service, many thanks. Best regards smile BFMX MINERALS CO.LTD 0086-18532255394 www.northmfminerals.com