# Onyx Replacement Bobbin [139800-300-999-17]

The Onyx Replacement Bobbin \[139800-300-999-17\] is an essential accessory for your Halkey-Roberts inflatable life jacket, ensuring you stay safe on the water. This yellow, water-sensitive bobbin is specifically designed to activate your life jacket when it comes into contact with water, providing you with reliable buoyancy in emergencies. Made from high-quality, durable materials, this bobbin stands up to the rigors of marine environments, ensuring long-lasting performance. Easy to install, it allows you to quickly replace a depleted bobbin, keeping your life jacket in top working condition. Perfect for boating, kayaking, or any water-related activities, this replacement bobbin is a must-have for anyone who values safety on the water. With a price of just $19.99, you can ensure your peace of mind without breaking the bank. Stay safe and enjoy your adventures with confidence!

## Details

- **Price:** 19.99 USD
- **Type:** Accessories
- **Tags:** 1st Class Eligible, Brand_Onyx Outdoor, Marine Safety, Marine Safety | Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 19.99 USD | In stock |

## Images

- Onyx Replacement Bobbin [139800-300-999-17] Onyx Outdoor

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> Source: [Besafe1st](https://besafe1st.com/products/onyx-replacement-bobbin-139800-300-999-17)
> Updated: 2026-06-04