NIOSH-Approved N95/N99 Masks for about $1 Get them now!
This filter tube is similar to the AF-0544 series, but has two sidearms with stopcocks, permitting its use with regular flasks or Schlenk flasks. This model is equipped with 2 mm glass stopcocks with constant pressure retention devices as shown. The inner standard taper joints are the same on both sides. Available in your choice of 14/20 or 24/40 joints, coarse or medium porosity and 20, 30 or 40 mm diameter.