Calling all skateboard and roller skate enthusiasts! These stainless steel ball bearings are exactly what you need for smoother, quieter rides. Each pack comes with 10 S623Z model bearings measuring 3mm inner diameter x 10mm outer diameter x 4mm height - perfect for upgrading your skateboard wheels, longboards, inline skates, or electric skateboards. Made from durable stainless steel, these bad boys are built to last with excellent corrosion resistance and can handle higher temperatures without issues. What I really love is how they provide high-speed rotation while keeping things super quiet - no more annoying whirring sounds! The compact design means stable performance and they can handle some serious load too. With low friction and consistent performance from start to finish, you'll notice the difference immediately. Whether you're cruising around the neighborhood or hitting the skate park, these bearings will give you that smooth, effortless roll you're looking for. Super easy to install and they work great with pretty much any roller equipment you've got. Definitely a must-have for anyone serious about their ride!