One Sylvania JAN CHS 6SN7GT VT-231 used vacuum tube. Two hole black plate....Tight glass and original tips...Tested excellent on my TV7 with minimum of 50/50.. Test results=104/102..No indication of gas, leaks or shorts. No other tests, ie. audio or noise, performed. Check my feed backs on honest selling, fast shipping and great packing. I combine..My return policy is clearly stated in this listing. Regards and Thanks