Product Name: 3.8mm 3.75mm 3.9mm 4.1mm C10 C15 Carbon Steel Balls for Linear Guides Model NO.: 3mm-15.875mm Material: Alloy Type: Bearing Standard: International Customized: Customized Color: Customized Certification: ISO Hardness: HRC 58-65 Surface: Mirror Like Shape: Round Solid Ball Grade: G80 Through G200 Selection: by Roller Selector Supply Ability: 300 Tons Per Month Size Range: 1.588mm to 25.4mm Trademark: XYB or OEM Transport Package: by Sea or Courier Like DHL Specification: 1.588mm - 12.7mm Origin: Shandong, China HS Code: 8482910000 Product Description Carbon steel balls chemical compositions:Chemical Composition Of Material(%)Carbon steel ballsCMnPS0.08--0.130.30--0.600.04 or less0.04 or lessChemicalCompositionItemC%Si%Mn%P%S%DensityHardnessAISI10100.10-0.150.10-0.350.30-0.600.040max0.050max7.861g/cm355-65HRCInternational StandardsCHNUSAGERFRAUKITARUSJAP1010101.1121CC10040A10C1010S10CHow to pack the carbon steel balls?Main usage of carbon steel ball:1.Ball bearings (Cars, home applications,industrial machines,etc.Components cars: Motor,generator,hub,constant-velocity joint(CVJ),steering,electromagnetic clutch,wiper,transmission,etc. 2.Linear guides 3.Ball screws and more