Parameter: Spool Diameter: 7.87" - Spool Width: 2.83" - Spool Hub Hole Diameter: 2.20".Weight:1 KG (approximately 2.20 lbs) Spool. High Purity& Strong ToughnessRANKI TPU flexible filament is a thermoplastic polyurethane (TPU) based filament.The most notable property of this filament is its flexibility. Beyond its flexibility, TPU is also very durable and hard to break, making for smoother 3D printing, and fewer extruder nozzle problems. Wide Compatibility1.75mm Diameter, High Diameter Tolerance, Universal Compatible with Diverse FDM 3D Printers in Market, (For example MK3, Ender 3, Monoprice ,CR 10, Mega, Chiron, FlashForge , etc.) Melt well and Feed Smoothly, Easy to Print. Printing TipsRecommended Printing Temp/Nozzle Temperature: 190-210°C (374-410°F), Base Plate Temperature: 50°C(122°F). Print speed: 20-30 mm/s.Shore hardness 98A. Satisfaction After-sale ServiceIf you are not satisfied with your purchase for any reason, please feel free to re