Intrinsic silicon wafer 25 mm x 25 mm

Dimention: 25 mm * 25 mm * 0.5 mm parallelism: 3-5′ Surface Polish: (Scratch-dig): 60/40 (One side polished) Surace roughness (RMS): 3-5 nm Transmissivity in midIR range (2.5 to 5.5 micron): >80%”