Black Empty Spools: package includes 20pcs black plastic empty spools 5.5cm/2.1 inch in diameter 2cm/0.7 inch thick inner diameter 2.5cm/1 inch axl 28cm/1.1 inch. Provide endless fun and creative opportunities Quality Material: the ribbon spools are made of quality plastic smooth on the surface without burrs sturdy and durable will not cause cracks when drilling holes thick enough to stand both manual and machine application Perfect Design: the plastic spools are in elegant hourglass design the threads are easier to wrap and easier to distinguish and the shaft hole of each spool is centered there will be no deviation during use feel free to unleash your creativity Easy to Use: hold the end of the thread against the flat part and start wrapping it around the center and the bobbin holds them to the strand helps you save up space for wires cords or ribbons and helps you complete the handmade project efficiently Wide Applications: the empty plastic spools are perfect for organizing thread wire twine cord bobbin chains ribbon and and many other items. Also perfect for DIY arts and crafts making and photo prop. Just unleash your creativity in textile wire weaving and DIY art projects