There are two main types of NTC thermistors: power NTC thermistors and temperature NTC thermistors. The pins of power thermistors are bent inward, outward, backward and forward, and straight, while the leads of temperature measuring NTC thermistors are various, including copper wire, CP wire, PVC wire, Teflon wire and so on. According to your needs, you can check it on the website of Tiheng Electronics. Their products are more comprehensive.