The thermistors look okay. I haven't used them or tested them but physically inspecting them, they look okay. The connectors don't fit my ender 3 though, and really that was the only real reason why I chose to buy these over another seller. As such, when I need to use them, I will need to de-pin them. Overall they will work, but it will take some effort to get them to work. I should note that I have a first release ender 3 pro.
These are NOT thermistors for hotends!!!!!