PLA Plus 5kg 1.75mm Filament Klein Blue - Large Spool for Big Prints

Our review of this SUNLU PLA Plus filament finds it aimed at makers who need uninterrupted, large-format printing with reliable dimensional control. The biggest reason to buy is the 5kg large spool, which lets users print sizable models without frequent swaps while maintaining dimensional accuracy of +/- 0.02mm. In practice the filament feeds cleanly on common FDM machines and produces bright, consistent Klein Blue color, making it a sensible choice for long runs and large projects.

Key Features

• 5kg large spool: A wide 300mm diameter and 120mm width spool holds 5kg of filament so you can print large models without interrupting the job to change spools.
• PLA Plus formulation: Claimed to be three times stronger than standard PLA, the PLA+ blend improves layer adhesion and reduces issues like warping and stringing during longer prints.
• Neatly wound spool: Advanced winding produces a tangle-free feed with no knots, which reduces the risk of print failures caused by filament snags.
• Dimensional accuracy: 1.75mm filament with +/- 0.02mm tolerance helps ensure consistent extrusion and compatibility with most FDM printers.
• Wide compatibility: Works with a broad set of FDM machines and accessories, fitting many printer spool mounts including common hobby models.

Who It's For

This filament is best for hobbyists, educators, and small shops that print large parts or run extended print sessions and want to avoid frequent spool changes. Users who value color consistency and cleaner winding will appreciate the 5kg spool when producing display pieces or functional prototypes.

People who only print small models occasionally, or who prefer specialty materials like flexible or engineering-grade filaments, should look elsewhere. Also, those with printers that cannot accommodate a 300mm diameter spool hub should confirm fit before ordering.

Pros & Cons

Pros

• Large 5kg spool minimizes interruptions for long prints and large projects.
• PLA Plus formula delivers stronger parts and better layer adhesion than standard PLA.
• Neatly wound filament reduces tangles and feeding errors during prints.
• Small diameter variance improves compatibility across most 1.75mm FDM printers.

Cons

• Some users report mixed durability results, with occasional breakage on specific setups.
• Large spool size requires a printer with sufficient clearance or a spool holder that fits a 300mm diameter spool.

Specifications

Brand	SUNLU
Material	PLA Plus (PLA+)
Diameter	1.75mm (tolerance +/- 0.02mm)
Net Weight	5kg
Spool Diameter	300mm
Spool Width	120mm
Spool Hub Hole	55mm

Our Verdict

The SUNLU 5kg PLA Plus in Klein Blue is a practical pick for users who run long prints or build large models and need consistent feed and color. With tight diameter tolerance and tidy winding, it offers good value for volume printing, though buyers should confirm spool fit and be aware some setups reported occasional filament breakage.

Frequently Asked Questions

Will this filament fit my printer?
It fits most 1.75mm FDM printers and common spool mounts, but check that your printer or spool holder accommodates a 300mm diameter and 55mm hub hole.

Is PLA Plus stronger than standard PLA?
Yes, the PLA Plus formulation is described as stronger with better layer adhesion than standard PLA, which helps for functional parts.

Does the spool tangle or cause jams?
The filament is neatly wound to minimize knots and tangles, and most users report a smooth feed, though proper spool mounting remains important.