Jacketed Tri-Clamp Spool With ½” MNPT Inlet/outlet ports on jacket 6”x 48”, 304 Stainless steel jacketed spool fully sealed material columns for holding dry plant for closed loop extractor system. Fully Jacketed Spools allow the user to circulate water through the jacket around the material column to heat up or chill solvent vapor. Spool connection attaches to tri clamp fittings, build out to suite.