Upgrade your RC car's performance with these precision ball bearings! This pack includes 10 bearings, each measuring 5mm inner diameter, 11mm outer diameter, and 4mm width. They're made from chrome steel (52100/GCr15) and rated ABEC 3 for smooth, high-speed operation. The bearings have yellow rubber seals (2RS) to help keep dirt and debris out. They're compatible with a bunch of popular RC brands and part numbers, like Traxxas 4611 and 5116, Arrma AR610019, Losi LOSA6947, HPI B022, Tamiya 58041, and Team Associated 25239 and 25618. Whether you're replacing worn-out bearings or doing a performance build, these bearings reduce friction and help your drivetrain spin more freely. They're great for wheels, transmissions, or any rotating part. A simple upgrade that can make a noticeable difference in speed and efficiency. Get ready to roll smoother and faster!