[AIR] Alchement - Flexible(TPU) Series, 3D Filament, 1.75mm, 1kg (Black-TPU) Material Type : TPU (thermoplastic polyurethane) Weight: 1 kg (2.2lbs) Diameter: 1.75mm (+/- 0.05mm) / Roundness: 1.75mm (+/- 0.03mm) Recommended Extrusion Temperature: 240~260C