The IG-640B from IGOS RF shielding is a RF Shielded Test Enclosure with Frequency 100 MHz to 6 GHz, Isolation/Insulation 90 dB, Interior Depth 18.9 Inches, Interior Height 18.9 Inches, Interior Width 22.83 Inches. Tags: Benchtop. More details for IG-640B can be seen below.