This medium black phenolic knob puts the perfect finishing touch on your amplifier or other project. Basic vintage design measures 0.75 diameter x 0.575 height (19 x 15 mm). Set screw for use with 6 mm shaft; white indicator stripe. Medium Phenolic Guitar / Amplifier Knob 0.75 - Black This medium black phenolic knob puts the perfect finishing touch on your amplifier or other project. Basic vintage design measures 0.75 diameter x 0.575 height (19 x 15 mm). Set screw for use with 6 mm shaft; white indicator stripe. Maybe you re repairing restoring or hot rodding an existing guitar amplifier or other electronic equipment. Perhaps you re devising your own unique musical or audio gear from scratch. Any way you slice it Parts Express has the quality components you need to finish the job right at prices you can afford. Product Details BrandParts ExpressPart Number240-2202UPC848864029436Unit of MeasureEachWeight0.05 Product Specifications ColorBlack