Description BLUE SEA 360 Panel Blank ML-Contura Switch / BS-1520 Switches two 230V AC sources. Red reverse polarity LED indicators. Green power available LED indicators. SPECIFICATIONS PART NUMBER: BS-1520 HEIGHT: 4.75″ (120.65 mm) WIDTH: 4.88″ (123.95 mm) DEPTH: 0.125″ (3.18 mm) WEIGHT: 0.64 lb (0.29 kg)