Vacuum tube socket 1.Attach to KT88/6550/EL34 2.All kinds of tube bases 3.Factory price and fast delivery ceremic bas vacuum tube socket used for 7-pin, 8-pin, 9-pin vacuum tubes such as EL34, 6CA7, KT88, 6P3P, 6550, etc. Vacuum tube socket1.Attach to KT88/6550/EL342.All kinds of tube bases3.Factory price and fast delivery ceremic bas vacuum tube socket