---
product_id: 25757233
title: "Ultra Super Flex Replacement Bowsight Fiber 40\""
brand: "nanoptics"
price: "£14.43"
currency: GBP
in_stock: true
reviews_count: 8
category: "Nanoptics"
url: https://www.desertcart.co.uk/products/25757233-ultra-super-flex-replacement-bowsight-fiber-40
store_origin: GB
region: United Kingdom
---

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

**Brand:** nanoptics
**Price:** £14.43
**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?** £14.43 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/25757233-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 Endure:** Crafted to resist fading and cracking, ensuring your fiber optic sight stays flawless season after season.
- • **Custom Color Control:** Choose your preferred vivid color to personalize your bow sight and stand out in every competition.
- • **Illuminate Every Shot:** Experience unmatched brightness with the market’s brightest fluorescent fiber for ultimate target visibility.
- • **Universal Compatibility:** Designed to fit all bowsights and sight pins, making upgrades effortless and seamless.
- • **Flexibility Meets Precision:** Easily bends around any sight or pin without kinking, giving you a perfect fit every time.

## Overview

Nanoptics Ultra Super Flex Replacement Bowsight Fiber 40" delivers the brightest fluorescent fiber optic technology, engineered for durability and flexibility. Compatible with all bowsights and sight pins, this 40-inch fiber is customizable in vivid colors and designed to enhance precision and visibility for archery pros and enthusiasts alike. Proudly made in the USA, it’s the go-to upgrade for superior sight performance.

## 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 | B009IUWGY6 |
| Best Sellers Rank | #186,579 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #332 in Archery Bow Maintenance Accessories |
| Brand | Nanoptics |
| Brand Name | Nanoptics |
| Color | Green |
| Compatible Devices | Compatible with all devices |
| Customer Reviews | 4.4 out of 5 stars 150 Reviews |
| Item Weight | 0.01 Ounces |
| Manufacturer | Nanoptics, Inc. |
| Material | Plastic |
| Material Type | Plastic |
| Mounting Type | Integral Mount |
| Night vision | No |
| Product Style | Tactical |
| Reticle Type | Duplex |
| Sport | Archery |
| Sport Type | Archery |
| Style | Tactical |
| UPC | 608729737049 |

## Product Details

- **Brand:** Nanoptics
- **Color:** Green
- **Sport:** Archery
- **Item Weight:** 0.01 Ounces
- **Material:** Plastic
- **Compatible Devices:** Compatible with all devices
- **Mounting Type:** Integral Mount
- **Night vision:** No
- **Manufacturer:** Nanoptics, Inc.
- **UPC:** 608729737049

## 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/25757233-ultra-super-flex-replacement-bowsight-fiber-40](https://www.desertcart.co.uk/products/25757233-ultra-super-flex-replacement-bowsight-fiber-40)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-14*