M3 Styli,2mm Ruby Sphere,L30mm Tungsten Carbide Shaft 
Straight styli are designed to inspect simple features where direct, unobstructed contact with a measured surface is possible. 
A tungsten carbide stem provides exceptional rigidity, particularly for styli with small ball and stem diameters. 
Ruby is regarded as the industry standard for stylus tips. It is one of the hardest materials available and suitable for most applications. 
NOTE: It is a substitute, compatible with Renishaw A-5003-0052
Specification
Ball material: Ruby
Ball dia. mm (in.): 2.0 (0.08)
Length mm (in.): 30.0 (1.19)
Stem dia. mm (in.): 1.5 (0.06)
EWL mm (in.): 22.8 (0.90)
Package: 1pc