1、PRACTICAL TOOL: The spool pin cap is a piece attached to the spool pin that holds the thread in place and helps the spool relax properly instead of jumping around while sewing. 2、MULTIFUNCTIONAL: Sewing machine spool pin cap is functional and can make your machine work better. It ensures fluent operation and prevents thread tangling, allowing you to focus on your sewing projects. 3、4 SETS: Enough quantity to meet your multiple needs, allowing you to use and replace it for a long time, or you can carry it with you as a spare. 4、DURABLE MATERIAL: Spool pin cap set is made of premium plastic material, not easy to break and deform, durable. It is designed to withstand frequent use, making it a valuable addition to your sewing machine accessories. 5、PERFECT REPLACEMENT: Spool pin and caps can effectively replace your old product accessories, making your machine easier and faster to use. 4 x Spool Pin4 x Spool Pin and Caps Item Type: Spool Pin Cap SetProduct Material: PlasticSuitable For: for Singer Sewing MachineFunction: Replacement of Old Sewing Machine AccessoriesProduct Size: Spool Pin Cap Diameter: Approx. 4.4cm / 1.6inSpool Pin Size: Approx. 2.5x 6.5cm / 1.0x 2.6in