Tooling ball glass prism reflector with removable ring, protection cover for optic and certificate, in wooden box.
Radius ball: 6.35 mm: ± 0.004 mm (0.2500 in ± 0.00016 in)
Centring of optics: ± 0.01 mm (± 0.00039 in)
Shape ball: ± 0.003 mm (± 0.00012 in)
Acceptance angle: with ring ± 22°, without ring ± 50°
Material ball: Stainless steel, surface-hardened, magnetic
Weight: 7 g (0.25 oz)