Ultraview UV Fiber - High-Performance UV Protection Fabric for Outdoor Gear, Apparel & Accessories | Perfect for Hiking, Camping & Sun Protection

0.019" Fiber for  use with UV - Center Drilled lens.

• Choose between 4", or 20" fiber lengths. 
• Comes with green fiber.
• 20" is typically used to fill the fiber spool in the UV3 scope
• 4" typically used to cut into short pieces (1/4" to 1/2") and then install into centre drilled lens.