The extraction cell is usually made of stainless steel, PEEK (polyether ether ketone), or any other suitable material that can withstand high pressure (up to 10,000 psi).
It is fitted with fingertight frits, which eliminate use of a wrench and reduces the wear and tear that can result from over- tightening. Research indicates that the shape of the cell has little impact on the extraction e‰ciency [24]. Short squat cells are preferred because they are easier to fill than the long thin ones. The extraction cell is placed in an oven that can heat up to 200C