Potentiometer Knobs - 20mm and 25mm

3 knobs for potentiometers with 6 mm shaft. The larger ones are 25 mm in diameter, one round with a line pointer, the other with a different style of pointer. The smaller one is 20mm in diameter. The picture shows 2 of the 25mm round and one of the 20mm one. This is the interface panel for an Atari Punk Console. .