The universal datum sphere enhances the use of both manual and automated CMMs It allows for quick and easy adjustment to set ball stem over a wide range of probe datuming angles. Allowing for datuming above, centrally and below the ball. The spheres are made from hard-wearing tungsten carbide and are available in five different diameters:•12 mm•19 mm•25 mm•3/4 in•1 in Each datum sphere is supplied with its own certificate, traceable to UKAS standards. Please note that datum ball fixing studs are not included in the kit.