Brand new high quality large 8 foot bakelite tube socket Material: bakelite Gold-plated feet, gold-plated mounting bracket Installation center hole distance: 38mm Panel cutout: 26.50mm Applicable to: EL34, KT88, 6V6, 6L6GC, 6550, KT66, 274B, GZ34, 5AR4, etc. Package Included:1pc Note: 1. Due to manual measurement, please allow an error of 1-3mm. 2. As different computers display different colors, thank you for your understanding, the actual product color may be slightly different from the image.