High hardness and toughness: Bearing steel is a high-quality steel that is specifically designed for bearing applications. It is characterized by its high hardness and toughness, which makes it an excellent choice for applications that require high load-bearing capacity and durability. Design:This high-performance bearing features inner and outer races machined from hardened stainless steel and polished balls made of premium chrome steel for incredibly smooth, reliable operation even under extreme loads. Versatility: These bearings are widely used in a variety of small machinery applications, including skateboard wheels, inline skates, and electric motors. Easy Installation : The compact integrated corrosion resistant stainless steel construction allows for quick press fit installation into tight spaces without the need for fastening hardware or bonding agents. Superb Performance : The meticulous hand-finishing and quality craftsmanship provide virtually frictionless, vibration-free and whisper-quiet spinning, making this bearing the smart choice for the most critical industrial equipment where failure is never an acceptable option. 10PCS 6701RS Bearing 12x18x4 mm ABEC-7 Hobby Electric RC Car Truck 6701 RS 2RS Ball Bearings 6701-2RS Blue SealedHigh hardness and toughness: Bearing steel is a high-quality steel that is specifically designed for bearing applications. It is characterized by its high hardness and toughness, which makes it an excellent choice for applications that require high load-bearing capacity and durability. Design:This high-performance bearing features inner and outer races machined from hardened stainless steel and polished balls made of premium chrome steel for incredibly smooth, reliable operation even under extreme loads.Versatility: These bearings are widely used in a variety of small machinery applications, including skateboard wheels, inline skates, and electric motors.Easy Installation : The compact integrated corrosion resistant stainless steel construction allows for quick press fit installation into tight spaces without the need for fastening hardware or bonding agents.Superb Performance : The meticulous hand-finishing and quality craftsmanship provide virtually frictionless, vibration-free and whisper-quiet spinning, making this bearing the smart choice for the most critical industrial equipment where failure is never an acceptable option.TECHNICAL SPECSModel: 6701RSSStructure: Deep GrooveMaterial: Bearing SteelGrade: ABEC-7Bore Dia (d): 12mmOuter Dia (D): 18mmWidth (B): 4 mmClosures: Sealed (2RS)Lubrication: GreaseClearance: C0