RiverStone Audio Platinum Grade Matched Pair Tube Set (2 tubes) with test results label. Please check the condition in the photos as these are old. Functionality confirmed. The performance of Platinum Grade is evident. Compared to 6J1, I felt the sound quality was brighter with a clearer outline and higher resolution. Comes with the original box and will be carefully packed and shipped via Yu-Packet Post. Cheaper than major online retailers. Price reduction not possible.