October 31, 2019 by INDO SERVICES INDO SERVICES M4 thread styli (Ø 7 mm )Extensions, Ceramic Search Order No. Material wt L (mm) 30-7 NVK Ceramic 6.7g 30.0 50-7 NVK Ceramic 8.9g 50.0 100-7 NVK Ceramic 13.8g 100.0