This is a spool holder for any sewing machine, using bearings to smooth the rotation for better line control and less vibration. It is designed for holding ~114 mm tall spools with a bottom side diameter of ~43,5 mm. To this print you will need: 2 x 608 Bearings 1 x M8x40 Bolt (Hex or Allen) 1 x M8 Nylon Insert Lock Nut 1 x M3x10 Bolt (Allen)