Construction: Features a ceramic socket and plated silver contacts for long-lasting use, designed for repeated testing. High Measurement: Delivers accurate mA readings with 24K gold-plated banana plugs, ensuring precise bias current for optimal tube performance. Universal Application: Ideal for home theater amplifiers and audiophiles seeking to maintain and optimize their tube amps' performance. Easy Operation: Simple setup with a multimeter and straightforward procedure to measure the cathode current for optimal bias setting., Weight: 0.12456117803 pounds, Manufacturer: Prterver