Kaseti ya PTFE, ikunze kwita kaseti ya Teflon, nibikoresho byingenzi bya kashe bikoreshwa cyane mubikorwa bitandukanye byinganda. Ikozwe muri polytetrafluoroethylene, fluoropolymer ikora cyane itanga imbaraga zidasanzwe, gutunganya hasi, hamwe nubushyuhe bwiza. Iyi mitungo ituma kaseti ya PTFE ihitamo ryiza ryo gufunga imiyoboro yuzuye, gukumira kumeneka, no kwemeza.