About the Item This is a set of a nipple driver for bicycles and 14G nipples. The driver has been used to build about one wheel. There are no problems. Spare parts are included for the rear wheel. The nipples are unopened, and the size is 14G (14mm x 6mm), 36 pieces. The color is silver, and the material is probably iron. The driver has a good grip, but it's a bit heavy. After a few turns, the nipple wrench takes over, so there's no shortage. Recommended for those who want a firm grip like a driver. Other Please ask if you have any questions; I usually reply around 9 am. I am also selling on other sites, and I will prioritize the first person to purchase.