Special diameter

Styli with standard diameters are manufactured in batches with a large quantity of spheres and can thus be manufactured cost-effectively. Styli with special diameters are custom-made devices that can only be produced in special manufacturing processes. Therefore, they can only be offered at higher costs or in larger acceptance quantities. The most common spherical material in this category is tungsten carbide, which means that limitations in the spherical shape must be taken into account, while ceramic materials are used primarily for inch sizes.