Replacement for 7-pin 5654/6A2/6AK5/6AK5W/6Zh1P/6J1/6J1P tubes. It can directly replace WE-403A/403B/EF95 and ordinary 5654. And can be used for the device that comes with 6J2/6J3/6J4/6J5/6K5 as a replacement. These 6A2 tubes show you the difference voice reproduction and simple musical. They sound more clear with an emphasis on clarity, larger soundstage, and response is more noticeable. Hear the difference, enjoy your music. High reliability and stability. HiFi and soft sound, low noise. It is fuller, soundstage. The treble is smoother and is clearer and more pronounced while more complex music was more defined. Note:Replacing the wrong type of tube may damage your amplifier or preamp. If you are not sure this 6A2 can be used as a replacement for your audio device, please check with your amplifier or preamp manufacturer. Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color: As Shown Material: Glass Package Contents: 2 pcs Vacuum Tube Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.