★★★★★ 5
Mug paper
Size: 3.5x9inch
Very good product to work on
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Reviewed in the United States on May 4, 2026
Fosi Audio Vacuum Tubes 7-Pin
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Fosi Audio Vacuum Tubes 7-PinEach package contains a pair of fully tested and matched vacuum tubes (2 PCS). 5654W vacuum tubes for T20, P1, P2, Box X2, Box X4. Substitute for 7 pin 6AK5 6AK5W 6Zh1P 6J1 6J1P tubes. It can also directly replace WE 403A 403B EF95 and ordinary 5654. 6J1, 6CB6A, 63N, 6J5, 65N tubes are compatible with audio devices such as BOX X2, BOX X4, P3, GR40, MC331, and T20X MKII. Note: Replacing the wrong type of tube may damage your amplifier. If you are not
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- Fast: 2-3 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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