This is the tungsten steel probe tip for 3D V6 touch probe/edge finder Main Features: Thread M2.5 x 4.5 mm/ 0.18 inch (length), Ball Diameter: 2 mm/ 0.08 inch, Total Length: 26.5 mm/ 1.04 inch Compatible with: Control Panel and GRBL. Color: Silver Material: Stainless Steel Package Contents: 3 x Touch Probe Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.