There's a few sizes, these are for the 4mm-ish flat ends. Black ones.
10x plain grey Graphic EQ fader tip slider cap linear potentiometer gray
Traditional Scottish Bagpipe in Plain Black – Perfect for Beginners and Professionals
Hasaller 2-Ply Plain Black Bell Truss Rod Cover for Les Electric Guitar Bass Replacement Part 2.05 Inch Hole Spacing 2.4 Inch Length Plastic Accessory
Plain Black Rotary Encoder Control Knob - 6mm D-Shaft Hole - Push Fit
Smooth Side Plain Black Control Knob 6mm Splined Hole
Plain Black Guitar Gig Bag – Basic Water-Resistant Soft Case for Electric Guitar
