7591 S is an octal power pentode with power of 19W. Special tube for some types of vintage amplifiers.
The price applies to one tube.
To get matched tubes you must order the number of tubes that you need and select the needed matching-option. For example: to get two quartet you must order 8 tubes and select the "quartet" matching. If you need a pair then order two tubes and choose the "pair" selection.
