... Nylon or bearing bus XK-450 Two Roll Mill/Rubber Open Mixing Mill/Laboratory Mixing Mill1.Certification:we have ISO9001:2008 ... nip adjusting, screw, heating and cooling device, emergency stop, lubrication system and such sections as electrical controls and, etc. 3.2 ... to producing, we use the good quality material, complete management system, also excellent aftersale service, we hope to be one reliable ...