Tested and matched pair (2 tubes) of NIB/NOS JAN 5654W 7 pin vacuum tubes with low noise. Considered one of the best tubes in the 5654/6AK5/EF95 family for audio use. Our platinum grade 5654W vacuum tubes are matched at less than 3% for plate current (ip) and mutual conductance (Gm). We guarantee that the selected 5654W tubes for our platinum grade paired pairs test at NOS levels equal to or greater than 4500 micro-mho with a plate current of 6.6mA or higher. All tubes must also pass a specialized life test and audio sound test. Riverstone Audio Platinum Grade tubes are supplied with data labels indicating IP and Gm measurements. The amplifier can be damaged if you replace the wrong type of tube. 5654W tubes should only be used to directly replace 6J1, 6J1P / 6J1P-EB / 6Zh1P-EV, 6AK5, 6AK5W and EF95 7 pin tubes. DO NOT substiture other types of 7-pin vacuum tubes unless approved as a substitute by the manufacturer of your audio device., Manufacturer: GE