The REOTEMP ISO-Ring Flow Thru Seal boasts an In-Line Flow-Thru design ideal for waste water, slurries, or abrasives. Mounted between pipe flanges or threaded in-line, it has a tough but sensitve elastomer lining. One unique feature of this seal is the ability to mount multiple instruments on one seal. Seals are available in Iso-Ring(Wafer) and Iso-Spool (Threaded) designs. Red Valve brand is available if the application requires.