The use of a larger ball increases the clearance between the ball and stem,thus reducing the possibility of contact between the stem and workpiece A larger ball also reduces the influence of the surface finish of a workpiece on measurement accuracy. A ruby ball provides a particularly hard,smooth surface, featuring high compressive strength and excellent machanical wiping . A stainless steel stem offers excellent rigidity and is ideal for applications where weight is not critical. 3mm ruby ball probe styli tip,20mm long,M2 thread. Thread shank: M2
Size : H4160
Ruby Head Diameter : 3mm(0.1181 in)
Length :20mm(0.7874 in)
Probe Tip Diameter :1.5mm(0.0591 in)
Effective length:17.5mm(0.689 in)
Material:Stainless steel