---
product_id: 18841283
title: "Ultra Super Flex Replacement Bowsight Fiber 40\""
brand: "nanoptics"
price: "£14.68"
currency: GBP
in_stock: true
reviews_count: 8
category: "Nanoptics"
url: https://www.desertcart.co.uk/products/18841283-ultra-super-flex-replacement-bowsight-fiber-40
store_origin: GB
region: United Kingdom
---

# Ultra-flexible, kink-resistant Brightest fluorescent fiber Durable, fade & crack resistant Ultra Super Flex Replacement Bowsight Fiber 40"

**Brand:** nanoptics
**Price:** £14.68
**Availability:** ✅ In Stock

## Summary

> 🎯 Light up your aim with the brightest, toughest fiber on the market!

## Quick Answers

- **What is this?** Ultra Super Flex Replacement Bowsight Fiber 40" by nanoptics
- **How much does it cost?** £14.68 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/18841283-ultra-super-flex-replacement-bowsight-fiber-40)

## Best For

- nanoptics enthusiasts

## Why This Product

- Trusted nanoptics brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Crafted to resist fading and cracking, ensuring your fiber optic stays vibrant through every season.
- • **Bend Without Breaking:** Engineered for superior flexibility, easily wrapping around sights and pins without kinking or damage.
- • **Illuminate Every Shot:** Experience unmatched brightness with the market’s brightest fluorescent fiber for ultimate target visibility.
- • **Universal Fit, Custom Style:** Fits all bowsights and pins with standard sizing, plus customizable colors to match your unique setup.
- • **Pro-Grade Quality, Made in USA:** Trusted by competition pros, Nanoptics leads the industry with premium optical fibers proudly manufactured stateside.

## Overview

Nanoptics Ultra Super Flex Replacement Bowsight Fiber is a 40-inch, ultra-bright fluorescent optical fiber designed for archery sights. It offers exceptional durability against fading and cracking, superior flexibility for easy installation, and universal compatibility with all bowsight brands. Made in the USA, it’s the top choice for pros and enthusiasts seeking enhanced visibility and reliability in their archery gear.

## Description

Nanoptics Ultra Super Flex (USF) fiber is the perfect fiber for everyday use by competition pros and enthusiasts alike. As our general use fiber, it is the brightest fiber available on the market. USF fibers easily flare with heat to stay secure in your sight pin. Each replacement pack contains one 40” fiber in your choice of size and vivid color. Our fibers fit all brands of archery sights and sight pins. Check with your sight manufacturer for proper size. Nanoptics is the worldwide leader of fluorescent optical fiber. As the leading supplier, we manufacture the brightest and toughest fiber in the industry. All of our products are proudly made in the USA.

Review: Excellent light transmission and flexible - Fantastic quality product. Very flexible, and seems pretty kink-resistant. Size is spot-on. Very bright transmission of light with the green color, and I was able to easily and carefully flare the tip to get a slightly bigger dot for visibillty as well as retention in the pin. Great value, and improved the quality of my sight with a better dot.
Review: It's BRIGHT - This stuff works!!! Bow sight company's should use this fiber optic on there sights ! It's alot tougher than I expected it to be a bright! JUST BUY IT!! YOU WILL NOT BE DISAPPOINTED!! I have a old axcel 5 pin bow sight that I love and the fiber optic was dry rotted and falling apart I replaced it with this and I'm extremely happy with ot!

## Features

- Bright - Fluorescent colors stand out against your target
- Durable - Won't fade or crack over time
- Flexible - Easily bends around sights and pins
- Customize - Use colors you prefer on your sight
- Standard sizes - Fits all bowsights and sight pins

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B009IUWBVE |
| Best Sellers Rank | #121,102 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #176 in Archery Bow Maintenance Accessories |
| Brand Name | Nanoptics |
| Color | Green |
| Compatible Devices | Compatible with all devices |
| Customer Reviews | 4.4 4.4 out of 5 stars (152) |
| Item Dimensions L x W x H | 40"L x 0.02"W x 0.02"H |
| Manufacturer | Nanoptics, Inc. |
| Material Type | optical fiber |
| Mounting Type | Bow Sight Mount |
| Night vision | No |
| Product Style | archery |
| Reticle Type | Dot or Post |
| Sport Type | Archery |
| UPC | 608729736882 |

## Product Details

- **Aiming Scope Sight Pin Size:** 0.02 Inches
- **Brand:** Nanoptics
- **Color:** Green
- **Compatible Devices:** Compatible with all devices
- **Material:** optical fiber
- **Mounting Type:** Bow Sight Mount
- **Night vision:** No
- **Product Dimensions:** 40"L x 0.02"W x 0.02"H
- **Sport:** Archery
- **Style:** archery

## Images

![Ultra Super Flex Replacement Bowsight Fiber 40" - Image 1](https://m.media-amazon.com/images/I/51mbNnOP-QL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent light transmission and flexible
*by M***S on October 28, 2025*

Fantastic quality product. Very flexible, and seems pretty kink-resistant. Size is spot-on. Very bright transmission of light with the green color, and I was able to easily and carefully flare the tip to get a slightly bigger dot for visibillty as well as retention in the pin. Great value, and improved the quality of my sight with a better dot.

### ⭐⭐⭐⭐⭐ It's BRIGHT
*by J***. on July 20, 2025*

This stuff works!!! Bow sight company's should use this fiber optic on there sights ! It's alot tougher than I expected it to be a bright! JUST BUY IT!! YOU WILL NOT BE DISAPPOINTED!! I have a old axcel 5 pin bow sight that I love and the fiber optic was dry rotted and falling apart I replaced it with this and I'm extremely happy with ot!

### ⭐⭐⭐⭐ Fluorescent orange fiber
*by J***S on October 29, 2021*

Very bright and high quality but definitely not orange. It is identical to the red fiber I have on my sight already.

## Frequently Bought Together

- Nanoptics Ultra Super Flex Replacement Bowsight Fiber 40"
- Nanoptics Ultra Super Flex Replacement Bowsight Fiber 12" (Pack of 5)
- AKEPO Fiber Optic Sight Replacement Rod for Gun Bow Sight Fluorescence Fiber Optic Sights Rod High Brightness Glow Stick Green/Red/Hunter Orange - φ0.019/0.029"/0.040"/0.060"/0.078" * L 7.87"(20cm)

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**Shop now:** [https://www.desertcart.co.uk/products/18841283-ultra-super-flex-replacement-bowsight-fiber-40](https://www.desertcart.co.uk/products/18841283-ultra-super-flex-replacement-bowsight-fiber-40)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-16*