Spring, Helical Compression, .245 O.D. x .26 Fits Century® II control block 013-025-00 Pkg-1 ea (A-dec® #013.025.00) Replaces 24V Volt/150 Watt bulbs in older 6300 lights A-dec® and Century® are 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.