HomeNew and unused. The Quam QC-4-50 is a 50 ohm potentiometer on brushed stainless steel wall plate. Power Handling: 4 watts. Mounting: 3 9/32" single gang electrical box.Quam Potentiometer 50 OHM 4 Watt – P/N: QC4-50$28.49PriceQuantityAdd to cart