... , Chrome plated shafts, Hollow shafts Dimensions:3mm,4mm,5mm,6mm,8mm,12mm,15mm,16mm,19mm,20mm,25mm,30mm,40mm,35mm,50mm,60mm ... can machining as you needDimensions: 6.35mm.9.525mm.12.7mm,15.875mm,19.05mm,25.4mm,31.75mm,38.1mm ... Hardness: HRC58-62Original: Ningbo China High Precision Hardened Linear Shaft 8mm