TPU (Thermoplastic Polyurethane) is a compound of hard plastic and rubbers suitable and mostly used for 3D printing. It is a flexible and elastic material that is incredibly useful for certain applications that require parts to be durable and rubber-like. This particular TPU has a Shore Hardness rating of 85A making it soft and extremely flexible. The surface finish it produces may not be as smooth as some stiffer materials.
Ease of Use
Print in better quality at 223°C nozzle temp with fan on at 40% starting the third layer.
Print at a slow speed.
Cold, sanded acrylic bed recommended. Leave sanding dust on bed for an easier removal.
Keep an eye during the transition between the first layer to second layer, tends to spaghetti out filament out of extruder.
You can tight more the spring arm on extruder to release tension and avoid spaghetti.