This is a paper cone used for winding and holding industrial thread. Length: 180 mm Small Diameter Outer Diameter: Φ28 mm Small Diameter Inner Diameter: Φ17 mm Large Diameter Outer Diameter: Φ49 mm Large Diameter Inner Diameter: Φ46 mm *Please be careful not to mistake this for a similar product with a length of 175 mm. *Measurements are approximate. *Labels are generally affixed to the inside. *Generally, there is a notch on the large diameter part for holding the thread. *Thread scraps may be attached. Please feel free to comment if you have any questions!