1. Nickel da chromium gami waya da insulating kayan sun zama mafi yawan samfurin. Yana zafi da sauri, yana da ƙarfin zafin jiki sosai, kuma yana da tsawon rayuwa.
2. Silicon rubber, wanda ke da ƙarfin juriya na zafi da kuma daidaitattun kayan aiki, yana aiki a matsayin mahimmanci na farko.
3. Abun yana daidaitawa kuma ana iya nannade shi kai tsaye a kusa da hita. Yana zafi daidai kuma yana yin hulɗa mai kyau.