From the manufacturer’s website: Phil Jergenson, who designed and produced the world famous Proto Pipe in the 1960’s,70’s and 80’s sold the company but never stopped improving his original pipe design. His new patented PROTO PIPE™ not only eliminates the troublesome trap with the Tarborator Flip™ but adds the Bowl Top Clip™. This patented Bowl Top Clip™ allows for sharing of hand rolled items.
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