Need some reliable sealed ball bearings for a project? This pack includes 10 brand new Nachi 6203-2NSE9 bearings. They're the C3 clearance type, with dimensions of 17mm inner diameter, 40mm outer diameter, and 12mm width—same as the common 6203RS size. These are sealed on both sides to keep dirt and moisture out, making them great for electric motors, machinery, skateboards, or any rotating application. Nachi is a trusted Japanese brand, so quality is solid. Country of manufacture isn't specified, but they're new in original packaging. Whether you're repairing equipment or building something from scratch, having a few spares on hand is always smart. Grab this pack and keep things rolling smoothly.