Runners designed to deliver a higher melt temperature to the cavity. This results in lower stress levels in the part without causing material degradation due to long exposure to elevated temperatures in the barrel. Conversions (Commonly Used in Injection Molding) KPa x 0.145 = psi MPa x 145 = psi °C x 1.8 + 32 = °F Liters/min x 0.2642 = Gal/min Inches x 25.4 = mm Flow rate = ((# of cavities) x (volume per cavity))/(injection time)