The disclosure concerns medical device parts having a thickness of about 4 mm or less, where the medical device part is manufactured by an injection molding process utilizing a polycarbonate polymer and from about 0.2 wt % to about 0.5 wt % of pentaerythritol tetrastearate and from about 0.05 wt % to about 0.3 wt % of glycerol monostearate wherein said pentaerythritol tetrastearate is derived from a biosource.
