Factory Pair Matched main grade 300B-Z power tube

Derscription
Factory Pair Matched main grade 300B-Z power tube

Features
- Super alloy technology
- Use "High Polymer Compound Carbon" material
- Gold grid
- Factory pair matched
- Gold plated pin, ceramic base
- Super high vacuum
- Suited for 10W audio power amplifier
Note
- The Royal Edition has better match accuracy and package.
http://www.siliconray.com/factory-pair-matched-shuguang-300b-98-tube-1.html