PEEK filament & capillary is an environmentally friendly material, which meets the food hygiene requirements of the US FDA, and is flame retardant and can be used in a wide range of applications. Production of PEEK filaments & capillaries with the following diameter specifications:1. Diameter 0.25mm; 2. Diameter 0.5mm; 3. Diameter 1.0mm; 4. Diameter 1.5mm; 5. Diameter 1.75mm; 2.5mm; 8. Diameter 3.0mm; 9. Diameter 4.0mm.