Food graded plastic (POM). The Food and Drug Administration (FDA) has approved Delrin (POM) for use in the food industry.https://en.wikipedia.org/wiki/Polyoxymethylenehttp://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?fr=888.3380
*PATENT PENDING The world's first Telescope Drip-Tip. Made by food graded stainless steel AISI 304-L. The first drip that you can change the top head.Soon available many top heads. !ATT! On tanks with top feeding screw it is not screw all the way down.
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