Abstract: A vent tube assembly is disclosed for use in a vent hole commonly found in metal molds which are used to produce, by rotational molding processes, a wide variety of plastic goods. The main body of the vent tube assembly is produced from a heat resistant, thermoplastic composition. Preferably, the composition will be polyetheretherketone (PEEK). The vent tube assembly resembles a probe-like rod comprising: a large diameter annular top section; an annular mid-section that is substantially smaller in diameter than the annular top section; and an annular bottom section that is slightly smaller in diameter than the annular mid-section and that terminates in with a rounded innermost tip. An elongated central bore is provided through the vent tube assembly. The central bore, along with a counterbore located near the top of the annular top section, provides an air escape passageway. The passageway fluidly communicates with the interior of the mold via a plurality of pore-like holes situated near the innermost tip.