The Ultimaker TPU 95A filaments come in 2.85mm diameter only, the roundness and the diameter is very constant.
These are the new spools with NFC for the Ultimaker 3. Of course it can be used on any other printer!
They come on a reel of 750g and the filament length is approximately 90m
Ultimaker TPU 95A (thermoplastic polyurethane) is a semi-flexible material that can be used in a wide variety of engineering applications where performance is more important than aesthetic qualities. Although most flexible filaments are usually difficult to print, Ultimaker TPU 95A is optimized for easier and faster printing without negatively affecting layer bonding