Flexible and Soft: Specially formulated plastic with an increased amount of flexibility, with rigid structure. Recommended for printing objects, which will be impacted more than normal ones. 1.75mm diameter, 87A hardness, 1.12 density(g/cm³). TPU (Thermoplastic Polyurethane) is a subclass of thermoplastics that prints strong parts that are also flexible. Suitable for Direct Extruder: There is no gap between the wire feed roller and the extruder, otherwise, the flexible material will curl and get stuck between the two, resulting in poor feeding. Premium TPU Filament: TPU (Thermoplastic Polyurethane) is a subclass of thermoplastics that prints strong parts that are also flexible. It has a certain degree of transparency, high mechanical strength, and good properties. Impact resistance & wide applicability: Great performance in waterproof, cold, and UV resistance, good for industrial production, medical applications, industrial arts, personal DIY, etc.