Discover the exceptional quality of Brimar 6SN7 smoked glass radio tubes, renowned for their superior performance and durability. Originating from the United Kingdom, these NOS (New Old Stock) tubes have been meticulously tested and boast an impressive rating of over 100% on a TV/7 tester, ensuring they surpass industry standards. Included in this offering are two units, each embodying the classic design and reliability that vintage audio enthusiasts and collectors alike seek. The 6SN7 model is recognized for its exceptional audio characteristics, making these tubes a must-have for those passionate about restoring classic electronics or amplifiers.