Sewing Machine -Sewing Machine Spool Pin Cap Plastic Useful Knitting Accessories Tool Supply New Highlights Generic Sewing Machine Spool Pin Cap Plastic Useful Knitting Accessories Tool Supply New Description: The pin cap holder - spool fits 1.69 inch spindle, its outer diameter is approx. 1 3/4 inches. Allows a second spool of thread for twin needle sewing. The Singer sewing machine spool pin cap is suitable for over 4000 5000 6000 9000 series. A spool pin is the part that attaches to the spool pin, which holds the thread in place and helps the thread unwind properly and not skip while you sew. The sewing spool cap is a piece that attaches to the spool pin that can hold the thread in place and help the thread unwind properly and not skip while you are sewing. The dual coil lead wires are made of high quality material, not easy to break or deform, allowing you to use them for a long time as a replacement. specification: Accessory name: pulley Application: sewing machine Applicable place: home Accessory use: sewing equipment accessories Diameter: 1.69 inch / 4.3 cm material: plastic Package includes: 4x spindle cap spool holder