Check the listing for details. 4pcs 3.9" Floss Bobbins Plastic Empty Thread Spools Weaving Bobbin Black. Condition: New. Listed at 31.37 USD. The Floss Bobbins are good for holding all sorts of thread, bobbin, cord, twine, strings, chains and so on, and great for use on DIY, craft, sewing, embroidery, and more.SpecificationColor: BlackMaterial: ABSDisc Diameter: 100mm / 3.9 inchShaft Height: 70mm / 2.7 inchDiameter: 50 x 20mm / 2 x 0.8 inch (Outer*Inner)Total Height: 90mm / 3.5 inchPackage Contents: 4 x Floss BobbinsAdvantageMade of plastic, no rust, reusable, smooth and sturdy. Designed with thicker side walls for extra durability. The plastic tube is lighter than metal and can easily wrap the thread on them.InstructionEasy to use. Just applied it on the bobbin to keep the thread tidy.Notice1. Universal bobbins are for most sewing machines.2. Please read the measurements before ordering if you are concerned about the size.