Features: The 7025 vacuum tube serves as a premium grade upgrade to 12AX7/ECC83, engineered with low noise architecture and high gain performances for audiophile grade amplification systems. Optimized twist filament design and internal shielding layers minimize microphonic interferences, delivering cleaner signals transmission and superior SNR compared to standard 12AX7 tubes. Ideal for guitarists seeking vintage tones and enthusiasts upgrading preamp stage in turntable systems or stereo amplifiers. Directly replaces 12AX7 tubes in guitar amplifiers like guard Twin or stacks, while enhancing clear in phono preamps and high end sound equipment. Rigorously tested under specifications, this electrons tube ensures consistent harmonic richness and dynamic responsiveness for critical listening environments. Specifications: Component : Glass Metal Size: 54×22.5mm Package Includes: 1xVacuum Tube note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.