Aopin 607-RS Skateboard Bearings - 8mm Ball Bearings (0.27" x 0.74") Double Rubber Sealed - 4 Pack - Perfect for Skateboards, Longboards, Roller Skates, Scooters & 3D Printers - Smooth Ride for Street Skating & Outdoor Sports

No Burrs, Smooth Rolling Perfect combination of bearings and steel ball machinery grease axis high speed high efficiency, easy operation. No burrs, smooth rolling, suitable for low-speed or high-speed use. Durable High Carbon Steel Single-row radial ball bearings are made of durable high carbon steel, double iron / double rubber seals are miniature, reliable, and have long service life Deep Groove Ball Bearing Double Iron Seal VS Double Rubber Seal? Which Is Better? The sealing performance of the double rubber cover is better. There is a layer of iron cover under the rubber, which can be dust-proof and waterproof; The double iron seal is only dust-proof and not waterproof, but the temperature resistance is better, according to your needs make a selection. No Burrs, Smooth Rolling Durable High Carbon Steel Double Sealed

◈Bearing Specification：607-RS Deep Groove Ball Bearing (Inner Dia.=7mm / 0.27", Outer Dia.=19mm / 0.74", Thickness=6mm / 0.23").

◈Where Is It Used? Rolling Bearings Use Rolling Elements To Maintain The Spacing Between Moving Parts, It With a Small Friction Coefficient And a High Limit Speed. Rolling Bearings Is Suitable For Skateboards Bearing, 3D printers, Inline Skates, Long boards, Scooters, Fidget Spinners, Motor, Bike, Pool Pump, Lawn Mower, Wheelbarrows, Carts & Hand Trucks Wheel. Great for Electric Motor Applications.

◈Great Quality Oil Reference Speed 35000 rpm. Grease Reference Speed 27000 rpm. Steel cage evenly spaces balls. Good stability, compatible with low speed / high speed rotation, smooth rolling. Removable single lip contact seals on both sides to protect against contaminants and retain lubrication. thereby reducing friction, vibration and noise. This ball bearing is great for skateboarding, inline skating and other skating applications, thereby increasing the life of the wheel.

◈Material Single-row Radial Ball Bearings Use Durable High-carbon Steel, Double Iron Sealed Miniature, Reliable, And Long Working Life.

◈What Will You Get? 4 pack 607-RS Deep Groove Ball Bearing.