... layerPolyurethane frothing50/55Capacity150L/180L/200L/240L/300LHole quantity15/18/20/24/30Tube pitch75mm/80mm------------------------------------------------------------------------------------------------------------------------------The frame and vacuum tubes of unpressurized ... : 30°,38°,40°,45°4.Holes quantity: 15/18/20/24/30Vacuum tubes:1.Materials: High borosilicate 3.3 glass2.Diameter ...