Choosing the right type of material to print a given object is becoming increasingly difficult as the 3D printing market sees the emergence of radically new materials. In FDM 3D printing, PLA and ABS have historically been the two main polymers (= type of plastic) used, but their initial dominance was mostly fortuitous. So there should not be any major road blocks for other polymers to play a key role in the future of FDM. We are now seeing new products become more popular, both pure polymers and composites. In this study, we focus on the main pure polymers that exist in the market today: PLA, ABS, PET, Nylon, TPU (Flexible) and PC. We sum up the key differences between their properties in snapshot profiles, so that users can make a quick decision about the best polymer to use for their application.