<http://schema.org/description>
"The drop in gauze is designed especially for use in glass down pipes. They can however, be used in all downpipes in other bongs. By bending the stem over the top edge of the downpipe the gauze is kept in place; the mesh then sits inside the bowl.\nPlease note - these are only sold in packs of 20"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.everyonedoesit.co.uk/drop-in-gauze-brass-20-pack.html>