Ceramic Tube Socket for EL34 6550 KT88 5U4G 5881 6L6 6P3P 6P6P 6n8p 5Z3P 5Z4P Ceramic Tube Socket for EL34 6550 KT88 5U4G . For 8 pins vacuum tubes Socke EL34 6550 KT88 5U4G 6P3P 6P6P 6n8p 6n9p 5Z3P 5Z4P 6j8, ect. Package includes: 1 x Ceramic Tube Socket for EL34 6550 KT88 5U4G