- VENDOR: Saekodive
Saekodive Tank Rattle - 6.5" Stainless, Magnet
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Standard delivery within 3–5 business days
Return items in original condition for a full refund
A 6.5-inch stainless steel tank rattle with a built-in magnet. Shake it to get your buddy's attention underwater — the sound cuts through better than banging your tank — and the magnet holds it quiet against your cylinder until you actually need it.
Why this one
It is a dependable, no-maintenance signalling tool: no batteries, nothing to break. The magnet stops it rattling as you swim, so you are not making noise until you choose to.
Specs at a glance
- Length: 6.5 inches
- Material: stainless steel
- Signal: audible rattle (underwater)
- Magnet: holds it silent until used
- Maintenance: none — rinse after saltwater
Tank rattle vs other ways to get attention underwater
| Method | Where it works | Hands-free | Notes |
|---|---|---|---|
| Tank rattle | Underwater | Clips on, magnet keeps it quiet | Cuts through better than banging your tank |
| Banging your tank | Underwater | No — need a hard object | Inconsistent, easy to miss |
| Surface whistle | Surface only | No | For boat pickup, not underwater |
FAQ
How does it stay quiet when I don't need it?
The magnet holds the rattle against your tank so it won't sound as you move. Break it loose and shake to signal.
Is it better than banging my tank?
It is more consistent and carries better underwater than tapping metal on metal, and it frees you from needing a hard object to hand.
Does it work at the surface?
It is for underwater attention. For surface signalling to a boat, use a whistle or an SMB instead.
Last updated: November 2026.