Musiclily Plastic Pointer Knobs for Guitar Bass Replacement, Red(Pack of 6) For guitar bass and amp knobs replacment, flat head style Small size, fits 6mm shaft diameter import concentric pots and split shaft pots.Not for Fender,CTS,Dimazio pots. Material: Plastic; Color: Red; Metric Size is popular in guitars bass made outside the USA/Mexico. Length:21.5mm,Width:16 mm,Height:13 mm Package include: 6 pcs knobs