California Filament Gray PETG vs IEMAI Matte PETG Filament

Both are 1.75mm PETG in gray on 1kg spools, so the real split is surface finish and spool system. The California Filament Gray is standard glossy PETG with tight +/-0.03mm diameter tolerance and a refill option that fits Bambu spools, which suits Bambu owners and anyone who wants predictable extrusion. IEMAI's matte PETG hides layer lines and prints at higher nozzle temperatures with a wider stated range, but its listings are inconsistent on color and its diameter tolerance is looser. Buy California Filament for accuracy and refill economy; buy IEMAI if a matte look matters more than tight tolerances.

• Choose the California Filament Gray if you print on a Bambu machine, want refills that reuse your existing spools, or need tight diameter tolerance for consistent extrusion.
• Choose the IEMAI Matte PETG if you want a non-glossy finish that hides layer lines on decorative or functional parts and your printer handles 230-270C nozzles.