Time delay relay kit replaces part numbers 2310202 and 230625. For use on 12VDC models NT24SP, NT30SP, NT34SP, NT40, NT12S, NT16S, NT20S, NT12SE, NT16SE, NT20SE, SF20, SF25, SF30, SF35, SF42, SF20F, SF25F, SF30F, SF35F and SF42F. Do not use on any 24VAC units. Also known as part # HBVR12D9X90. Wires included.