--- product_id: 13431347 title: "Ferrite Ring Magnet, 4In Dia, Ceramic for Science Experiment" brand: "aomag" price: "S$35" currency: SGD in_stock: true reviews_count: 13 category: "Aomag" url: https://www.desertcart.sg/products/13431347-ferrite-ring-magnet-4in-dia-ceramic-for-science-experiment store_origin: SG region: Singapore --- # 120 lbs pull force 100mm outer diameter High corrosion & demagnetization resistance Ferrite Ring Magnet, 4In Dia, Ceramic for Science Experiment **Brand:** aomag **Price:** S$35 **Availability:** ✅ In Stock ## Summary > 🧲 Elevate your projects with magnetic mastery – don’t get left behind! ## Quick Answers - **What is this?** Ferrite Ring Magnet, 4In Dia, Ceramic for Science Experiment by aomag - **How much does it cost?** S$35 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/13431347-ferrite-ring-magnet-4in-dia-ceramic-for-science-experiment) ## Best For - aomag enthusiasts ## Why This Product - Trusted aomag brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **DIY & Beyond:** Perfect for speakers, sensors, crafts, and scientific experiments - • **Built to Last:** Corrosion and demagnetization resistant for rugged durability - • **Clutter-Free Workspace:** Organize metal tools effortlessly with this heavy-duty ring magnet - • **Precision Crafted Size:** 100mm diameter with a 60mm hole for versatile mounting - • **Unmatched Magnetic Power:** 120 lbs of gripping force to hold your projects tight ## Overview The AOMAG Ferrite Ring Magnet is a robust 4-inch diameter ceramic magnet featuring a 60mm center hole and 20mm thickness. With a powerful 120-pound pull force and exceptional resistance to corrosion and demagnetization, it’s engineered for durability and versatility in DIY, industrial, and scientific applications. Ideal for organizing tools, enhancing speakers, or powering creative projects, this magnet combines strength and economy in one sleek, heavy-duty donut shape. ## Description desertcart.com: Ferrite Ring Magnet, 4In Dia, Big Round Circle Ceramic Magnets with Hole, Strong Large Donut Circular Magnetic Ring Heavy Duty for DIY, Crafts Speaker Creative Hobbies Science : Industrial & Scientific Review: They are strong! - This is a project peace Review: Perfect! - Very strong magnet and is exactly what I needed. Very well packaged and arrived in perfect condition. Thanks! ## Features - 【Strong Magnetic Performance】Ferrite Ring Magnets Large Round Magnet with Holes. Size - OD: 100mm(3.95"), ID: 60mm(2.36"), Thickness: 20mm(0.79"). With Grade 10 magnetic strength, these large magnets provide robust magnetic adhesion, ensuring they stay firmly attached to any metal surface without slipping. - 【Strength & Durability】Large Ring Ferrite circle magnets with Hole has high demagnetization resistance, corrosion resistance and oxidation resistance. High-quality materials determine the quality of magnets. The Round Circle Magnets are highly resistant to demagnetization, corrosion, making them suitable for use in challenging environments without the need for additional protective coatings. - 【Efficient Storage Solution】 - Use the large ring magnets to organize and secure metal tools and other items, saving space and reducing clutter in your workspace.Round Ceramic magnets made by molding process have more rounded edges than those cut by cutting, and are made of rare earth permanent magnetic materials mixed with other metal materials. - 【Multiple Uses】These Big round magnets are widely used as classroom magnets, refrigerator magnets, industrial magnets, whiteboard magnets, motors and generators, sensors, speaker magnets, scientific magnets and DIY magnets.With the ability to meet the needs of all your magnetic projects, the magnetic ring will be a reliable tool in your daily life. - 【ECONOMICAL】Compared with NdFeB magnets, this large ring ferrite magnets have no advantages in magnetic force, but magnets of the same size (compared with NdFeB magnets) sell for only a small part. The round circle magnets with hole will be packed by original AOMAG trademark package. Powered by AOMAG Only! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B007OXE3LI | | Best Sellers Rank | #49,048 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #26 in Industrial Ceramic Magnets | | Brand | AOMAG | | Brand Name | AOMAG | | Color | Dark Grey | | Customer Reviews | 4.5 out of 5 stars 774 Reviews | | Item Dimensions L x W x Thickness | 3.93"L x 3.93"W x 0.78"Th | | Item Thickness | 20 Millimeters | | Item Weight | 1.1 Pounds | | Manufacturer | AOMAG | | Material | Ceramic | | Material Type | Ceramic | | Model Number | 7-303578JFA | | Number of Pieces | 1 | | Part Number | 7-303578JFA | | Product Dimensions | 3.93"L x 3.93"W x 0.78"Th | | Pull Force | 120 Pounds | | Shape | Round | | Unit Count | 1 Count | ## Product Details - **Brand:** AOMAG - **Color:** Black - **Material:** Ceramic - **Product Dimensions:** 3.93"L x 3.93"W x 0.78"Th - **Shape:** Round ## Images ![Ferrite Ring Magnet, 4In Dia, Ceramic for Science Experiment - Image 1](https://m.media-amazon.com/images/I/51J6vGD7njL.jpg) ## Questions & Answers **Q: what is the lifting capacity of this magnet?** A: I’m my experience between 325 - 370g. **Q: what is the equivalent pull force?** A: This magnet can pick up about 100 paper clips **Q: What is the diameter of the inner hole?** A: 2-1/4" ID **Q: how many gauss?** A: wasn't posted on the box ## Customer Reviews ### ⭐⭐⭐⭐⭐ They are strong! *by V***L on April 21, 2026* This is a project peace ### ⭐⭐⭐⭐⭐ Perfect! *by A***R on June 12, 2023* Very strong magnet and is exactly what I needed. Very well packaged and arrived in perfect condition. Thanks! ### ⭐⭐⭐⭐ 🧲 *by S***I on January 15, 2026* Not as strong as thought to be yet holds small metal screws & such ## Frequently Bought Together - Ferrite Ring Magnet, 4In Dia, Big Round Circle Ceramic Magnets with Hole, Strong Large Donut Circular Magnetic Ring Heavy Duty for DIY, Crafts Speaker Creative Hobbies Science - Legrand Pass & Seymour S752WCC10 660W 250V Medium Base A26 Lampholder, Cleat Sockets, Front Wire, White (1 Count) - Hillman 25' 18 Gauge Bare Copper Wire --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/13431347-ferrite-ring-magnet-4in-dia-ceramic-for-science-experiment](https://www.desertcart.sg/products/13431347-ferrite-ring-magnet-4in-dia-ceramic-for-science-experiment) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-07-07*