Quick Summary
This is a pack of 21 aluminium emergency whistles with key rings. The whistle is described as small and portable, making it straightforward to keep on a key ring or carry in a bag when a compact alerting tool is needed.
The stated length is 4.7 cm and the diameter is approximately 0.9 cm. The whistle is also described as waterproof and rust-proof, with an anti-oxidation surface treatment. Buyers should confirm the pack quantity and the exact size if those details matter for how the whistles will be carried or distributed.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Product type | Emergency whistle pack. The set contains multiple whistles rather than a single item. |
| Pack quantity | 21 pieces. Check this matches the number needed for the intended use. |
| Material | Aluminium alloy. This is the stated material for the whistle body. |
| Length | 4.7 cm / 1.85 inches. Useful for judging pocket, bag or key-ring carry. |
| Diameter | Approx. 0.9 cm / 0.35 inches. Helpful when comparing size and handling. |
| Included fitting | Key ring. This supports attachment to keys or other carried items. |
What to Compare Before Buying
- Pack quantity: This set contains 21 whistles, so compare the count with how many people, kits or locations you need to equip.
- Size: The whistle measures 4.7 cm long and about 0.9 cm in diameter, so check that this suits your preferred carry method.
- Attachment: A key ring is included, which matters if you want to keep the whistle attached to keys or similar items.
- Material: The whistle is aluminium alloy, so compare this with any material preference for your chosen use.
Before You Decide
Confirm the 21-piece count and the 4.7 cm size before choosing an offer. If you want whistles for multiple people or for several kits, the pack quantity matters most. The whistle is supplied with a key ring, so check that this suits how you plan to carry it.






