... screw in machine, with high rigidity Screw support unit :Purpose : Screw support unit is used to support screw in machine.Feature: wide ... , easy installation, good performance, abrasion resistance.Types of screw support unit: Model EK, EF, FX fixed side, FK, FF, BK, BF ... ..And you are assured of our first-rate screw support unit and best, prompt service always.If any interests or questions ...