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Ferrite Ring Magnet | 21x7x5mm | Black | Pack of 1 - Speaker Magnet
₹ 5/-
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School Project Supplies
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About This Product 💥
Key feature
A ring magnet with a centre hole to screw or glue in place. This black ferrite (ceramic) ring magnet is 21mm across with a 7mm hole and 5mm thick, sold as 1 magnet. Ferrite rings are the classic magnet in loudspeakers and simple motors, and handy for craft and DIY.
Specifications
| Type | Ferrite ring magnet |
| Material | Ferrite (ceramic) |
| Shape | Ring |
| Diameter | 21mm |
| Hole size | 7mm |
| Thickness | 5mm |
| Colour | Black |
| Pack | 1 magnet |
Perfect for
- Speaker and motor projects
- Holding with a bolt through the centre
- Fridge magnets and craft
- School science projects
Compatibility
Works with: steel, screws and bolts through the hole, and other magnets.
Pairs well with: craft glue or epoxy for a fixed mount.
Not suitable for: electronics, bank cards, phones and pacemakers.
Before You Buy
- Ferrite is brittle and can chip if snapped together.
- The photograph is shared across ring sizes; the size is as listed.
- Near twin: the silver neodymium ring magnets are smaller and much stronger; this one is black ferrite.
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Frequently Asked Questions
What size is this ferrite ring magnet?
It is 21mm across with a 7mm hole and 5mm thick, and you get 1 magnet. Do not overtighten a screw, as ferrite can crack.
How is it different from the 25x12x7mm ring?
This one is 21mm across, 7mm hole, 5mm thick; the 25x12x7mm ring is 25mm across, 12mm hole, 7mm thick.
To keep reviews honest, only our customers who bought this item can leave a review.
Shipping
We ship across India to serviceable pin codes.
Orders are usually dispatched within 1 to 3 business days.
Delivery typically takes 2 to 14 business days after dispatch, depending on your location. Timelines are estimates.
Shipping charges, if any, are shown clearly at checkout before payment. No hidden charges.
Free shipping is available on eligible orders, as displayed on the website.
Orders may arrive in multiple packages depending on size or availability.
7 Day Easy Returns
Changed your mind? Return most products within 7 days of delivery.
Products must be unused, unopened, and in original condition with all packaging and tags intact.
Return shipping is paid by the customer. You can self-ship or request a reverse pickup (pickup charges are deducted from the refund).
Original shipping charges are non-refundable for change-of-mind returns.
Refunds are processed to your original payment method within 7 business days after verification. No restocking fee.
To start a return, email support@justkraft.com with your order number.
Damaged, Wrong or Missing Items
Received a damaged or wrong product? We will send a free replacement or full refund, including shipping.
A clear, uncut unpacking video is required for damage or wrong item claims. Report within 7 days of delivery.
Missing items must be reported within 48 hours of delivery.
Please Note
Minor variations in colour or finish may occur due to lighting, screen settings, or the handmade nature of some products. These do not qualify as defects.
Customised products, hygiene-sensitive items, and opened consumables (paints, adhesives, resins, pigments with broken seals) are non-returnable unless damaged, defective, or incorrect.
All orders are subject to our Shipping Policy, Returns, Refunds & Cancellation Policy, and Terms of Service.
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