A high velocity impinger (Ref. AGI-30) which passes 12.0 to 13.0L/min. (corrected to engineering standard gas conditions) when the pressure drop across the orifice is 41cm Hg or greater. Stopper fits 24/25 125ml bottle and features a 11mm OD center tube, 8mm OD side arm with bulge, 0.05in capillary tip that is positioned 30mm above the bottom of the bottle. Particulate capture range: 0.8 to 15 microns.