PRS Guitars Knob, Lampshade, Clear w/black (2) Genuine PRS Guitar Lampshade Knobs ACC-4246 Fits all PRS American made guitars. Fits 513, 305, DGT, Mark Tremonti, Artist, CE, Custom, Santana, Singlecut, Swamp Ash Special, S2, Standard models. Includes 2 knobs. Color: Clear/Black