Guitar Tech Control Knobs S-Type. White. 1 Volume/2 Tone from Guitar-Tech is 100% original and brand new. We, at Melody House take pride in our after sales service and support. For further details on the Guitar Tech Control Knobs S-Type. White. 1 Volume/2 Tone, Guitar-Tech, simply write to us to consult an expert or order online and we will take care of the rest. Happy Shopping!