Have you found yourself in a maze of twisty-turny knobs, all alike? These micro potentiometer (or rotary encoder) knobs offer a rainbow burst of color to your synth or control panel. They are made of a hard plastic, with a grippy star shape sometimes referred to as "Davies 1900" style, though they may not be a perfect size/color match for original Davies knobs.The micro knobs work with any shaft type (round, D-shaft, or T18) because they come with a tiny set screw. Use a 2mm hex wrench (not included) to carefully tighten the knob once placed.This is the yellow version, sold in a pack of four knobs. Color: Yellow Pack of four knobs Hard plastic material Grippy star shaped design Compatible with various shaft types: round, D-shaft, or T18 Tiny set screw included for securing knob Dimensions: Diameter of top: 12mm / 0.4" Diameter of base: 12.7mm / 0.6" Height: 15.8mm Weight: 1.2g per knob