The 61903 ball bearing from Ceramicspeed is a high-quality deep groove ball bearing designed for a variety of applications. With an inner diameter of 17 millimeters, an outer diameter of 30 millimeters, and a width of 7 millimeters, it offers a precise fit and high performance. The bearing is made of ceramic, a material known for its excellent properties in terms of durability and corrosion resistance. Weighing 13.85 grams, it is robust yet lightweight, making it ideal for use in demanding environments. The silver color gives the product a modern and appealing look. This ball bearing is an excellent choice for anyone looking for a reliable and long-lasting solution to enhance the efficiency of their machines or devices.