Tested and matched Pair (2 tubes) of low-noise 7-Pin NIB/NOS GE JAN 5654W Vacuum Tubes. Considered one of the best of the 5654 / 6AK5 / EF95 family of tubes for audio use. Higher Durability and Life. 5654W tubes can ONLY be used to replace 7-Pin 6J1, 6J1P / 6J1P-EB / 6Zh1P-EV, 6AK5, 6AK5W or EF95 tubes. Do not substitute for other 7-pin tubes or tubes with different codes. utilizes the best available equipment to test and match audio tubes. EXPERIENCED ENGINEERS match vacuum tubes for BOTH plate current and mutual conductance., Manufacturer: DollaTek