ELEGOO CA-EL-3D-PHE21 Rapid PETG Filament, 1.75 mm, Red and Blue, 2 kg

For printing parts that need some light to pass through, or everyday items where you want a PETG option, the ELEGOO Rapid PETG filament comes as two 1 kg spools in red and blue. It is designed for 1.75 mm FDM printers and is advertised for high-speed printing, with a stated maximum of 600 mm/s. Its claimed light transmission and lower warping and shrinkage compared with PLA may also matter for parts that diffuse light.

The two-colour pack gives you separate filament choices without buying two separate listings. Is that useful for your projects? It depends on whether red and blue suit the parts you plan to make.

Spec sheet

• Name: ELEGOO Rapid PETG
• Type: 3D printer filament
• Material: Polyethylene terephthalate glycol (PETG)
• Format: Two 1 kg cardboard spools
• Colour: Red and blue
• Weight: 2 kg
• Diameter: 1.75 mm
• Reference: CA-EL-3D-PHE21

ELEGOO states a dimensional accuracy of ±0.02 mm and a printing-speed range of 30–600 mm/s. The filament is described as suitable for regular and high-speed printers, including most 1.75 mm FDM printers. Listed examples include Neptune 4 models, K1 series, Ender 3 V2, Kobra 2 series, M5 and M5C, printer compatibility still depends on the machine accepting this filament diameter.

Best use cases

This PETG is aimed at functional prints and daily-use items, with the manufacturer describing it as flexible, impact-resistant and easy to print. Those are material-level claims, not a guarantee that every design will have the same strength. For parts involving light diffusion, its stated light transmission offers a reason to consider it over a more basic filament choice. The advertised lower warping and shrinkage compared with PLA may also be relevant when choosing between the two materials.

Buyer feedback is generally positive about print appearance and ease of use, including reports of good results at higher speeds. However, experiences are not uniform: some buyers mention tangling, while feedback on adhesion and brittleness is mixed. The product description says the filament is neatly wound to reduce tangles, but that does not mean every spool will feed without issue.

Included in the pack

The pack contains one red and one blue 1 kg spool, both described as cardboard spools. That format suits a workflow where you want two colours on hand for separate jobs, it does not indicate that the colours can be combined in a single print without a printer or setup that supports changing filament.

The manufacturer advises using the filament soon after opening and drying it completely before using it again. Following that handling guidance is worth factoring into your routine, particularly if you do not expect to use a spool soon after unpacking.

Should you buy it?

It suits you if you need 1.75 mm PETG in two colours, want to try higher-speed printing, or are making practical parts where PETG’s stated toughness and light transmission are relevant. Compared with choosing PLA, this PETG is presented as a lower-warping, lower-shrinkage option with useful light-diffusing potential, rather than simply a standard filament for general prints.

It might not be a great match if your printer does not accept 1.75 mm filament, or if consistent winding and feeding are essential and you would rather avoid the possibility of spool tangles reported by some buyers. Consider the stated speed as a capability, not a promise that every printer, model or setting will produce the same result. The two-spool pack makes most sense when both colours are useful for your planned prints.