Which are 5 toughest filaments I ever tested? #shorts

About

My name is Dr. Igor Gaspar, I am a mechanical engineer and I work as a teacher and researcher on MATE (ex. SZIE) university in Budapest, but this channel is about my hobby: 3D printing, Arduino electronic, CAD and 3D design, web development, photography, etc. If you would like to support my work, my Patreon page: https://www.patreon.com/mytechfun Other info, downloadable files are on www.mytechfun.com website. Important, for review video requests: I am located in Europe, but most of my viewers are from English language countries (USA, UK, AU, CA, DE..) There are no sponsored videos on my channel, all my honest reviews I do for free and there is no possibility for censoring the video. Also, it is important to mention, that for products sent outside of EU I have to pay duty and tax fees. Since I am still very small YouTube channel, sender must accept these fees. This is just short version of my terms, full version is available on mytechfun.com website.