Honeyville stocks the Black EPDM Rubber hose with wire helix for use with lightly abrasive dusts such as wet sawdust, grass clippings, etc.  Stock sizes include 2", 3", 4", 5", 6", 7", 8", 10", and 12".  The wall thickness is 0.039" on the 2" and 3", and 0.047" on the larger sizes.  Other types of flex hose, including metal flex, are available by special order.  Call and talk to John Jones for more details and pricing.