Set of 2 Dan Totsu S size! Power tested, they work, but one has significant wear on the black non-woven fabric surface, making it quite thin. There's also a shine on the cord as if it's been rubbed (see image 4), and it's missing a screw. The other one has a slightly melted appearance on the cord's surface, possibly from contact with another heating device (see image 5). These are old, used electrical appliances, so their lifespan is uncertain. Please use used electrical appliances at your own risk. Returns and complaints are not accepted after purchase, so please do not buy if you have reservations or concerns about used electrical appliances. We recommend purchasing new ones from a store. I do not remember the number of years passed or the period of use. Dan Totsu Heater Heating equipment Reptile supplies Amphibian supplies Midori Shokai Rep Japan Shipping will be via Rakuraku Mercari (Nekopos or Compact) for the two Dan Totsu units.