Koress is a hookah stem with a traction control system wigh allows you to regulate the blow from easy to classic anytime while smoking. Three indicators of traction on the stem are regulated by a special pad on the main part with a vertical stroke. Hookahs are made of steel AISI-321 with a base of polyacetal and plastic lining on the stem. Smoke is coming out through vertically under the plate on the principle of the popular model from Alpha Hookah.