YS YS-PETG-BU-2.85-1.0 PETG Filament, Compatible with Ultimaker/Airwolf/Luzbot 3D printer, 2.85 mm 1kg, Blue Perfectly wound filament without tangles 2.85mm Filament Diameter (Tolerance: +/- 0.05mm) Quality Certificate: ROHS, ISO9001 Recommended Print Temperature: 220 - 260C (Better with Heated Bed) Spool Diameter: 7.9" - Spool Width: 2.6" - Spool Inner Hub Diameter: 2.2"