Encoded Rail 2M With Radius Kit , Reference Sphere , Highprecision Vibration Isolation Table , Transmission Spheref/# 1.0 -1.5 , Transmission Sphere F/# 3.2 -3.8 ,Transmission Sphere F/# 7.0 -7.5 , Reference Flat , Dataanalysis And Storage Unit , Five Axis Mounts , Selfcentering Element Holder , Attenuation Filter , Transmissionflat , Vibration Insensitive Laser Interferometer (Withcompatible Adapters, Cables Along With Connectors E Quantity: 16