Yana amfani da SS don fil da hanyoyin haɗin waje, da filastik injiniya na musamman (matte fari, POM ko PA6) don hanyoyin haɗin ciki, don mafi kyawun juriya na lalata fiye da daidaitattun jerin. Koyaya, a shawarce ku lokacin zabar cewa matsakaicin nauyin da aka yarda shine 60% na daidaitaccen jerin sarkar.