Check the listing for details. 2pcs. 6F1P / 6Ф1П = 6BL8; ECF80 Triode-Pentode tube. Foton 1963. Condition: Used. Listed at 17.90 USD. 6F1P / 6Ф1П. = 6BL8; ECF80. Triode-Pentode tube.