Fits Century® II Water Coolant Valve (A-dec® #29.0830.00) Fits panel-mount 2-way toggle valves & 2-way push button valves Replaces 24V Volt/150 Watt bulbs in older 6300 lights A-dec® is a registered trademark of A-dec, Inc. DCI has no affiliation with A-dec and A-dec has not authorized DCI replacement parts to be used on or in connection with A-dec® products.