Specification: Material: Plastic and metal Weight: 13 g / 0.46 oz Product(needle) Diameter: 1.3\1.6\2.2cm / 0.051\0.063\0.087in Package list: 1 * Pen 2 * Thread 3 * Needles(1.3/1.6/2.2 mm) Note: How to use this product: A Insert threader into needle shaft until the folded end of the wire appears at the other end. Place thread inside the wire loop. Pull threader back through the needle shaft until thread emerges from the tip.Remove thread from the threader. Insert the thread. needle in the needle hub until the folded end of the thread appears at the other end.Place the thread in the loop of the needle threader. Remove the needle threader from the needle until the needle threads out of the end of the needle. Remove the thread from the needle threader. B Insert threader through the eye from back (rounded) front side to (beveled) side. Place thread inside the wire loop. Pass the needle threader through the eye of the needle on the back (rounded) to the front (beveled) side of the needle. Place the thread in the threader loop. C Pull threader back through the needle eye. Remove thread from the threader, leaving to 2 "tail. 2 "/ 5cmC-Remove the needle thread from the needle eye Remove the thread from the needle threader Leave a 5cm tail behind the eye of the needle.