November 6, 2019 by INDO SERVICES INDO SERVICES M4 thread styli (Ø 7 mm )Extensions, Steel Search Order No. Material wt L (mm) 10-7 NV Steel 2.5g 10.0 15-7 NV Steel 3.9g 15.0 20-7 NV Steel 5.4g 20.0 30-7 NV Steel 8.4g 30.0 35-7 NV Steel 9.9g 35.0 50-7 NV Steel 14.0g 50.0