Ring Bobbin Ring bobbin for all kinds of ring frames,such as Toyota,Rieter,Marzoli,Jinwei,EFJ and so on. The length for blade spindle:180mm,205mm,230mm,232mm The length for adaptor spindle:180mm,200mm,210mm,230mm Material:ABS, PC, PC with glass fibre Bottom with steel ring With bakelite bush inside for long life