Appears to be 3/16" black plastic tubing on a cardboard roll that is 18" diameter, sealed in plastic. [Technically, I think that it is called high density polethylene, not NSF approved. . I know, they look HUGE in the photos]. Perfect for arts or craft projects. Pricing and Terms: Cash only. Monday-Friday between the hours of 9:00-4:00. 1 roll=$8.00 4 rolls=$25.00 8 rolls=$50.00 . ONLY SOLD AS ONE, FOUR OR EIGHT ROLLS. Please respond to ebalasco@etmgreen.com or pick-up at ETM-green, 117 Pettaconsett Avenue in Cranston. [This street is where the Aldi's Market is.] Ask for Ed. Thanks. Location: Cranston it's NOT ok to contact this poster with services or other commercial interests rhodeisland