Liquid metal thermometer, commonly known as a mercury thermometer. ※This is for one item.※ I found a few while cleaning, so please let me know if you need any.※ ※Unused. I've done a simple test with lukewarm water, but if you're concerned, please purchase a digital device.※ ※Liquid metal thermometers that are not mercury are currently available, but I cannot determine if this is one of them.※ ※I will ship via the inexpensive Mercari shipping service with free shipping, so if you are concerned about shipping issues, please request cash on delivery.※ The main body has no scratches or stains, but the case (plastic or acrylic?) may have storage scratches, so please refrain from purchasing if you are sensitive to such things. Mercury thermometers, which are not often seen these days, are durable, so they are useful as a backup when digital thermometers are malfunctioning, or for dealing with and preparing for troubles during disasters.