This listing is for two high-quality Sunlite ball bearing retainers, perfect for use in bottom brackets of one-piece crank bikes. Made of durable steel and crafted in Taiwan, these bearings are designed to ensure smooth operation of your bicycle. With a diameter of 5/16" and 10 balls, these bearings are compatible with a variety of bikes and are easy to install. The silver color adds a sleek touch to your bike's bottom bracket. Upgrade your bike's performance with these reliable ball bearing retainers.