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Isakhiwo esithile simi kanje:6.8 ububanzi obungaphandle: Ishubhu yangaphakathi yeTeflon + ungqimba locingo lwensimbi, ngaphandle kwesikhumba sePU.7.5 ububanzi obungaphandle: Ishubhu yangaphakathi yeTeflon + ungqimba lwensimbi yensimbi + ungqimba lwesikhumba sePU, futhi usayizi uhlanganisa isikhumba.10.5 ububanzi obungaphandle: Ishubhu yangaphakathi ye-Teflon + izingqimba ezintathu zocingo lwensimbi + ungqimba olulodwa lwesikhumba se-PU, futhi usayizi uhlanganisa isikhumba