Groove Tubes

Even though I am a musician, I do not know what the Groove Tubes guitar center are used for, but I am sure that if you are a guitarist you have some idea. If I am being honest, I don't even know the names of all the pieces used on drums - and I play the drums! I suppose knowing that stuff is kind of important but I focused on improving my skill at drumming, to the detriment of any kind of technical knowledge. That stuff is more important to guitarists anyway - at least in my estimation.