Penta Laboratories is a world class manufacturer and distributor of a wide range of electron tubes and vacuum tubes. Their product line covers broadcast, industrial, research, military, medical, scientific, and high-end audio applications. Penta Laboratories has over 8,000 stocking part numbers and an inventory far in excess of a million vacuum tubes. Their company is especially well experienced in the manufacturing of ceramic/metal vacuum tubes, triodes and tetrodes – a Penta specialty.