This is a top quality Treble Bleed Circuit using a 0.001uf Silver Mica Capacitor and a 150K Metal Film Resistor + - 1% not the usual 5%.

The picture on the left is to show you the item made up as shipped and on the right the size relative to a Volume pot.

Comes complete with instructions and explanation.

Silver Mica Capacitors are the first choice for Treble Bleed Circuits due to their close tolerance smooth tone and convenient size.