The 1.5″ (38.1mm) SMR Premium Kit Drop-Resistant Structure Spherically Mounted Sphere for Laser Tracker contains:
Hollow Reflector *1
• Drop-resistant Structure
• K9 Optical Glass
• Stable Multi-Layers Coating
• 5arcsec Beam Deviation
• 80m Working Range
Hardened Steel Sphere * 1
• 1.5inch Diameter
• SUS-440C Steel
Removable Ring *2
One with wristband
Better Than 0.0003″
Rotating Offset