The Spectrum PLA Silk Rainbow is based on Spectrum's PLA Silk. The silky-smooth appearance of this filament in combination with the special colour gradient ensure that your prints always have a unique look. You print this filament with high precision and stability. This makes this filament perfect for making decorative items such as jewellery, gadgets or artistic decorations. This is a 1.75mm fire red filament on a 1kg spool.