Several different types of proteins are found within our intermediate filament. Now, the special thing about intermediate filaments is that not only are they found within a cytoplasm they're also found within the nucleoplasm within our nucleus and they're also found outside our cell. So the function of intermediate filaments is to give our cell tensile strength and increase the stability of our cell structure. The intermediate filaments, because they're found outside our cell are also involved in creating structures between different cells so binding cells together. And finally, the microtubule, the thickest and the largest and the strongest type of fiber found in our skeleton. It has a thickness of about 23.