YS YS-ALU-N-1.75-1.0 ALUMINUM PLA Filament, Compatible with Makerbot/UP/Afinia/Robo 3D printer, 1.75 mm 1kg, Natural Perfectly wound filament without tangles 1.75mm Filament Diameter (Tolerance: +/- 0.03mm) Quality Certificate: ROHS, ISO9001 Recommended Print Temperature: 190 - 240C Spool Diameter: 7.9" - Spool Width: 2.6" - Spool Inner Hub Diameter: 2.2"