Standard autoclavable lab funnels feature sturdy polypropylene construction and faster-than-average filtration due to the filter-step internal design. Ribs molded into the outer wall prevent airlock and parallel 8mm funnel stem fits into most narrow mouth containers.
Heavy Duty funnels are similar to standard but feature a wide mouth for safer liquid handling and have extra thick construction which makes them suitable for rugged laboratory use.
Autoclavable Powder Funnels have either short or long stems and wide mouths for easy transfer of solid particles. They have parallel stem walls to prevent the powder from bridging within the funnel.