SUNLU 4KG High Speed PLA Filament 1.75mm - Fast Cooling, Pack of 4

In this review of the SUNLU High Speed PLA filament pack, the bottom line is simple: it is aimed at makers and small workshops that want to cut print time without sacrificing reliability. The reviewer found the 4kg bundle (four 1kg spools) delivers consistently good print quality when tuned for faster speeds, with the single biggest reason to buy being its engineered flow and cooling that enable sustained printing above typical speeds. The pack is practical for multi-color prototyping or longer runs where reduced drying and clogging matter.

Key Features

• High flowability: The filament is formulated for a large increase in flow, allowing reliable extrusion at higher speeds so prints finish faster.
• Efficient cooling: Improved heat dissipation helps layers cool and cure sooner, reducing deformation during rapid printing.
• Lower average print temperature: The recommended printing temperature is generally lower than standard PLA, which can save time and reduce energy use on long jobs.
• Consistent diameter: Tight diameter tolerance of 1.75mm 0.02mm supports steady extrusion and fewer extrusion-related defects.
• Dry, sealed packaging: 24-hour pre-packaging drying and vacuum sealing reduce moisture-related issues like bubbling and clogs during prints.
• Value pack: Four 1kg spools in white give ample material for extended projects or for swapping filament colors between runs.

Who It's For

The SUNLU High Speed PLA is best for hobbyists, educators, and small workshops that regularly run prototypes and need faster turnaround. Users who tune slicer settings and adjust temperatures to match higher print speeds will benefit most from the engineered flow and cooling improvements.

This filament is less suitable for absolute beginners who are uncomfortable changing slicer parameters or troubleshooting stringing and adhesion issues, since high-speed PLA can be more temperature-sensitive than standard PLA and may require calibration for best results.

Pros & Cons

Pros

• High-speed formulation reduces average print time while maintaining usable print quality.
• Improved heat dissipation keeps fast prints from deforming and helps layer bonding during rapid cooling.
• Consistent 1.75mm diameter and pre-drying reduce common extrusion problems like clogs and bubbles.

Cons

• Temperature sensitivity can cause stringing or adhesion variation unless slicer settings are adjusted.
• Some users report mixed adhesion and occasional brittleness, so bed preparation and part design matter.

Specifications

Brand	SUNLU
Material	High Speed PLA
Diameter	1.75mm 0.02mm
Weight	4kg total (4 x 1kg spools)
Print Speed Range	30mm/s - 600mm/s (engineered for reliable flow above 250mm/s)
Packaging	24-hour pre-dry and vacuum-sealed spools

Our Verdict

The SUNLU 4kg High Speed PLA is a strong value for users who want to accelerate prototyping and are willing to tune their slicer and temperatures. It delivers noticeable speed and cooling benefits, reliable diameter control, and useful packaging that reduces moisture issues. For makers who need faster turnaround and consistent spools, it is a practical buy; novices seeking plug-and-play simplicity might prefer a standard PLA tuned for slower speeds.

Frequently Asked Questions

Can this filament run at very high speeds?
Yes, it is formulated for high flow and can be used at elevated speeds, but you should match slicer speed and temperature recommendations and watch for stringing.

Does the pack include moisture protection?
Yes, spools are pre-dried for 24 hours and vacuum-sealed to reduce moisture and bubbles during printing.

Is bed adhesion different from regular PLA?
Adhesion can vary; some users report mixed results so proper bed preparation and calibration are recommended.