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Kretrum refills (no spool) filament, ranked by £/kg

Every listing of Kretrum refills (no spool) filament we track on Amazon UK, ranked by £/kg.

5 listings tracked.

Product	Material	Weight	Rating	Price	Per kg	Deal
Kretrum PLA 3D Printing Filament 1.75mm Dimensional Accuracy +/- 0.2mm 1KG 2.2	PLA	1 kg refill	★★★★½ 4.4 out of 5 (228 Amazon ratings)	£17.23	£17.23	52% below
Kretrum PLA Filament 1.75mm 3D Printer Filaments Cardboard Spool Refills 1kg W	PLA	1 kg refill	★★★★½ 4.4 out of 5 (539 Amazon ratings)	£19.96	£19.96	52% below
Kretrum PLA Filament 1.75mm 3D Printer Filaments Cardboard Spool Refills 1kg W	PLA	1 kg refill	★★★★½ 4.4 out of 5 (539 Amazon ratings)	£20.19	£20.19	49% below
Kretrum PLA Filament 1.75mm 3D Printer Filaments Cardboard Spool Refills 1kg W	PLA	1 kg refill	★★★★½ 4.4 out of 5 (539 Amazon ratings)	£39.97	£39.97	—
Kretrum PLA Filament 1.75mm 3D Printer Filaments Cardboard Spool Refills 1kg W	PLA	1 kg refill	★★★★½ 4.4 out of 5 (509 Amazon ratings)	£43.95	£43.95	—

Refills (no spool) filament by brand

Guides

• Bed adhesion: what actually works
  Glue sticks, hairspray, rafts, brims and expensive surfaces — an honest ranking of what fixes prints coming loose, starting with the free fix that solves most cases.
• Do you need a filament dryer?
  Wet filament is real and ruins prints, but a dedicated dryer is not the only answer. How to tell if moisture is your problem, and what to do about it.
• Filament storage: dry boxes, vacuum bags and desiccant
  Keeping filament dry is cheaper than drying it out. What actually works, what desiccant to use, and why the little sachet in the bag is already spent.
• First layer calibration, properly
  Nearly every adhesion problem and half of all print failures start in the first layer. How to set Z offset by eye, and what a good first layer actually looks like.

Best-selling Filament by year — which actually sold best, going back several years, ranked by sales position rather than opinion.