... noise/high resistance 3.Nylon or bearing bus XK-450 Two Roll Mill/Rubber Open Mixing Mill/Laboratory Mixing Mill1.Certification:we have ISO9001:2008 , SGS, CE ... : This machine is mainly used in Rubber & Plastic Product factory for Natural Rubber Mixing(plasticating),Raw Rubber and Compound mixing,rubber warm-up mixing and pressing sheet.4 ...