Rainbow, flexible TPU filament for functional and design prints. The Hello3D "Rainbow B" variant brings a smooth color transition during printing. Hardness 95A, accuracy ±0.05 mm, recommended print 200–230 °C / 0–60 °C / 20–40 mm/s. Vacuum packed with silica gel.
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HELLO3D Flexible TPU 0.8 kg – Rainbow B is a multi-color (rainbow) flexible filament made of thermoplastic polyurethane for FDM/FFF printing. Thanks to the Shore 95A hardness, it is suitable for parts requiring flexibility, shock absorption, and abrasion resistance – from grips and covers to fashion and decorative items that also impress with the smooth "Rainbow B" color transition.
Why choose this filament
Multi-color "Rainbow B" gradient for effective, unique prints – the color changes throughout the length of the string. Hello3D uses Rainbow A/B/C/D markings for rainbow series; variant B offers a different sequence of shades.
Flexible TPU with Shore 95A hardness – high toughness, impact, and abrasion resistance.
Diameter accuracy ±0.05 mm for stable feeding and high-quality surface.
Vacuum packaging with desiccant to limit moisture – ready to print.
Proven print settings from manufacturer/dealers, compatible with most desktop 3D printers (direct drive preferred).
Recommended print settings
Nozzle temperature: 200–230 °C
Bed temperature: 0–60 °C
Print speed: 20–40 mm/s
Retraction: short or minimal (depending on printer), lower speeds increase reliability.
Values are based on recommendations from verified Hello3D TPU dealers.
Tips for printing TPU
Prefer a direct drive extruder (print slower with Bowden).
Keep the filament dry; store it back in a resealable bag with silica gel between prints.
Design and fashion: bracelets, accessories, grips, decorations with a rainbow effect.
RC and hobby: tires, flexible couplings, shock absorbers.
Compatibility and logistics
Filament diameter: 1.75 mm (accuracy ±0.05 mm).
Net weight: 0.8 kg.
Packaging: vacuum with silica gel in a resealable bag.
In Czech e-shops, it is also offered as "HELLO3D TPU (Flexi)" with a weight option of 0.8 kg and verified AMS compatibility (spool width suitable for AMS). Parameters may vary slightly depending on the batch.
Key features:
"Rainbow B" transition for visually attractive prints.
Flexible TPU with 95A hardness – impact and abrasion resistance, excellent vibration damping.
Stable dimensional accuracy ±0.05 mm for reliable feeding.
Verified print recommendations: 200–230 °C / 0–60 °C / 20–40 mm/s.
Vacuum packaging with desiccant for protection against moisture.
Compatible with most FDM printers; ideal with direct drive extruder.
