... tube section: stainless tube, tube diameter 25mm. Tube length 1.6m,internal with stainless screw ot industrial galvanized tube. 2.Smooth tube section: stainless smooth tube, tube diameter 25mm. Tube ... length 1.5m. 3. local resistance section: tube ... 7.Valve and T connector etc. Tube, material is 304stainless steel. 8.Operation ...