Feature integration grows, with windproof technology, rechargeability, and multi-function designs (e.g., ashtrays with snuffers) becoming common
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Our joint cones also feature a straight gum-line, which means less paper and a more even burn
** However, you can see that the inside is pretty dirty (who's going to see that?) ~ and there's a little area on one side of the metal rim that's open (2nd to last photo)
January 1, 2003
European Standard EN 1822-1:2009, "High efficiency air filters (EPA, HEPA and ULPA)", 2009 American Society of Mechanical Engineers, ASME AG-1a2004, "Addenda to ASME AG-12003 Code on Nuclear Air and Gas Treatment", 2004 1 2 "Specification for HEPA Filters Used by DOE Contractors DOE Technical Standards Program"