bushes with irregular hole:Material: SUS440, HRC 58; Tolerance: +0.01mm/+0.002mm;

Round bushes: Material: SKD11; HRC 58;Tolerance:+0.01mm/+0.002mm; 

Datum bushes/ lock bushes:Material: SKD11; HRC 58;Tolerance:+0.01mm

Material: SKD11 ;  Finish: surface Plating