--- product_id: 379444468 title: "Block Ferrite" brand: "jmy" price: "COP 170859" currency: COP in_stock: true reviews_count: 8 url: https://www.desertcart.co/products/379444468-block-ferrite store_origin: CO region: Colombia --- # Rust-proof in fresh & salt water 29 lbs holding force per magnet 3850 Gauss magnetic strength Block Ferrite **Brand:** jmy **Price:** COP 170859 **Availability:** ✅ In Stock ## Summary > 🧲 Stick with the best—powerful, durable, and ready to elevate your craft game! ## Quick Answers - **What is this?** Block Ferrite by jmy - **How much does it cost?** COP 170859 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co](https://www.desertcart.co/products/379444468-block-ferrite) ## Best For - jmy enthusiasts ## Why This Product - Trusted jmy brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Heavy-Duty Grip:** Each magnet supports up to 29 pounds—perfect for crafts that stick with you. - • **Magnetic Powerhouse:** Grade 8 ceramic magnets deliver a robust 3850 Gauss for serious hold. - • **Weatherproof Wonder:** Built to resist rust and corrosion, ideal for indoor and outdoor projects alike. - • **Versatile Creativity:** From science experiments to DIY crafts, these magnets fuel your innovative edge. - • **Budget-Savvy Strength:** Get premium magnetism without the rare earth price tag—smart spending for savvy creators. ## Overview These 12 Grade 8 ceramic ferrite magnets measure 1 7/8" x 7/8" x 3/8" and deliver a strong 3850 Gauss magnetic field with 29 pounds of holding force each. Economical and rust-resistant, they are perfect for educational projects, crafts, and light-duty applications both indoors and outdoors. ## Features - 【POWERFUL】 Grade 8 ceramic magnet material with 3,850 Gaussian internal. Each piece can provide 29 pounds of holding force under ideal conditions. - 【ECONOMICAL】This ceramic magnet is an economical choice for magnets. Only a small part of the cost of a rare earth magnet of similar size. - 【DURABLE】They will not rust in any environment. Suitable for fresh water or salt water. Magnetism will always continue normal use. - 【APPLICATION SCOPE】Science education in schools, children's science projects, namely suspended trains, hand-made at home, light work in the backyard or garage, etc. - 【BUY WITH COMPLETE CONFIDENCE】If you are not satisfied with the magnet for any reason, we will provide a 30-day no-guaranteed money-back guarantee. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B09H5CRPLY | | Best Sellers Rank | #39,532 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #24 in Industrial Ceramic Magnets | | Brand Name | BY JMY | | Color | Black | | Customer Reviews | 4.6 4.6 out of 5 stars (463) 4.6 out of 5 stars | | Item Dimensions L X W X Thickness | 1.89"L x 0.87"W x 0.39"Th | | Item Thickness | 9.53 millimeters | | Manufacturer | BY JMY | | Material Type | Ceramic | | Model Number | 000000001 | | Number Of Pieces | 12 | | Part Number | 000000001 | | Pull Force | 4 pounds | | Shape | Rectangular | | Upc | 710955890440 | ## Product Details - **Brand:** BY JMY - **Color:** Black - **Material:** Ceramic - **Product Dimensions:** 1.89"L x 0.87"W x 0.39"Th - **Shape:** Rectangular ## Images ![Block Ferrite - Image 1](https://m.media-amazon.com/images/I/71-xC4uT1sL.jpg) ![Block Ferrite - Image 2](https://m.media-amazon.com/images/I/71ReAy9d6uS.jpg) ![Block Ferrite - Image 3](https://m.media-amazon.com/images/I/51ycApIV1IL.jpg) ![Block Ferrite - Image 4](https://m.media-amazon.com/images/I/61mqKX86zmL.jpg) ![Block Ferrite - Image 5](https://m.media-amazon.com/images/I/61GqKcFSuZL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect size. *by on Reviewed in the United States December 29, 2025* These are very powerful magnets. I ordered them in to put address numbers on them for my mailbox. They are a perfect size for the numbers I ordered in. Now when I change covers I can put these on for my mailbox numbers. Other magnets were questionable if they would hold through the mailbox cover. No problem with these! They were a good price for such powerful magnets. I was concerned about the thickness of them but love that it gives our address numbers a three dimensional look. They are supposed to be weather resistant and not rust. Time will verify that. Very happy with them. ### ⭐⭐⭐⭐⭐ Strong magnets. Great product ! *by on Reviewed in the United States February 24, 2026* Very strong. Thank you for a great magnet. ### ⭐⭐⭐⭐⭐ The best *by on Reviewed in the United States October 23, 2025* I used these magnets to sew into the hem of my parrot cage cover. They are extremely strong. This is my second purchase . ## Frequently Bought Together - BY JMY Ferrite Blocks Ceramic Magnets 1 7/8" x 7/8" x 3/8" Rectangular Magnets, Grade 8 - for Crafts, Science and Hobbies - 12 Pieces - BNTECHGO 30 AWG Magnet Wire - Enameled Copper Wire - Enameled Magnet Winding Wire - 4 oz - 0.0098" Diameter 1 Spool Coil Red Temperature Rating 155℃ Widely Used for Transformers Inductors - BNTECHGO 28 AWG Magnet Wire - Enameled Copper Wire - Enameled Magnet Winding Wire - 1.0 lb - 0.0122" Diameter 1 Spool Coil Natural Temperature Rating 155℃ Widely Used for Transformers Inductors --- ## 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.co/products/379444468-block-ferrite](https://www.desertcart.co/products/379444468-block-ferrite) --- *Product available on Desertcart Colombia* *Store origin: CO* *Last updated: 2026-08-22*