Q: 【What Are You Worried About 】A: You Are Hesitating That Other People Are Already Using It, No Matter What The Reason Is That You See This Product. During This Time, Staying At Home, I Seem To Be Very Bored, But With This Product, My Life Has Hope. Only Sell Good Quality Goods, Low Prices Will Only Bring Inferior Products, You May Wish To Try Our ProductFeatures: This Ball Bearing Is Made Of High Quality Ceramic Zro2 And Ptfe Material, Features High Precision, High Speed, And Wear Small. Small Frictional Resistance, Low Power Consumption, High Mechanical Efficiency. Resistant To Corrosion And Able To Operate In Harsh Conditions. With The Characteristic Of High Stability, High Reliability. Standardization Size, Used For Machinery Manufacturing, Equipment Installation And Maintenance. Specification: Material: Ptfe, Ceramic Zro2 Model: 6202 Inner Diameter: 15Mm / 0.6Inch Outside Diameter: 35 Mm / 1.38Inch Thickness: 11Mm / 0.4Inch Weight: 38G/1.3Oz Package List: 1X Zro2 Ball Bearing