--- product_id: 616911749 title: "CMS MAGNETICS – 21 AWG, 4-Ounce Spool, 112 Feet Long Enameled Copper Magnet Wire for Science, Speaker Coil, Transformer, Inductor, DIY Project - 392°F Working Temp, 1.6A Rated Current" brand: "cms magnetics" price: "S$25" currency: SGD in_stock: true reviews_count: 1 category: "Cms Magnetics" url: https://www.desertcart.sg/products/616911749-cms-magnetics-21-awg-4-ounce-spool-112-feet-long store_origin: SG region: Singapore --- # 1.6A rated current for reliable performance 112ft length for extensive projects 392°F heat resistance for durability CMS MAGNETICS – 21 AWG, 4-Ounce Spool, 112 Feet Long Enameled Copper Magnet Wire for Science, Speaker Coil, Transformer, Inductor, DIY Project - 392°F Working Temp, 1.6A Rated Current **Brand:** cms magnetics **Price:** S$25 **Availability:** ✅ In Stock ## Summary > ⚡ Wire up your innovation with pro-grade magnetics! ## Quick Answers - **What is this?** CMS MAGNETICS – 21 AWG, 4-Ounce Spool, 112 Feet Long Enameled Copper Magnet Wire for Science, Speaker Coil, Transformer, Inductor, DIY Project - 392°F Working Temp, 1.6A Rated Current by cms magnetics - **How much does it cost?** S$25 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/616911749-cms-magnetics-21-awg-4-ounce-spool-112-feet-long) ## Best For - cms magnetics enthusiasts ## Why This Product - Trusted cms magnetics brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted by Experts:** Preferred by engineers and hobbyists for transformers, speakers, motors, and more - • **High-Temp Endurance:** Withstands up to 392°F (200°C) ensuring stability under intense conditions - • **Generous 112ft Spool:** Ample wire length to fuel your ambitious DIY and engineering projects - • **Precision 21 AWG Gauge:** Perfect 0.72mm diameter for professional coil winding and electrical applications - • **Durable Enameled Insulation:** Amber coating resists wear and tear, maintaining wire integrity and performance ## Overview CMS MAGNETICS 21 AWG enameled copper magnet wire offers 112 feet of premium, durable wire on a 4-ounce spool. Rated for 1.6A current and heat resistant up to 392°F, it’s engineered for precision coil winding in transformers, motors, speakers, and DIY projects. Trusted by professionals for consistent quality and performance. ## Description CMS Magnetics Magnet Wires are sold in 4 ounce spools. Length varies depending on the AWG size. It has an operating heat rating of 200 Degree Celsius (392 Degree Fahrenheit). These are high quality copper wire with a thin layer of insulation. It can be used in electric motors, transformers, inductors, speakers, DIY projects, science experiments, and other industrial utilization. Review: Excellent wire! - Exactly as advertised, this work is nice and stiff yet easy to manipulate. I use this work for repairing PCB traces and winding custom Rf coils. It is very high quality. Tip: a little bit of sandpaper will easily remove the enamel insulation to make soldering easier. ## Features - Size: 21 AWG, Diameter: 0.72mm, Weight: 4 Ounce, Length: 112ft, Resistance: 13.01 ohms/1000ft, Rated Current: 1.6A, Maximum Current: 1.9A, Working Temperature: 392°F (200°C) - Buy CMS Magnetics brand with confidence that all spools are equal to 4 ounce worth of high quality enameled coated magnet copper wire regardless of the size. Total length of wire is based on the gauge size (diameter of wire) since weight and material will always be the same. Our brand's reputation is important to us as well as our ability to deliver on exceptional customer service. We will never cheat you out on material or quality. - These insulated wires are highly durable and will not break while winding your coils. The quality of the material makes it very efficient for your application. - This amber color enameled insulation is highly durable and have tested to withstand up to 392 degrees fahrenheit or 200 degrees celsius. If for any reason you prefer direct connections to the wire, you could use sandpaper to strip the enamel off. - Trusted by engineers and science enthusiasts. These magnet wires are perfect for electrical applications such as winding transformers, motors, speaker coils, electromagnets, tesla coils, and inductors. They're also great for use in science experiments, hobbies, and do it yourself projects. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CHN7XFB3 | | Brand | CMS MAGNETICS | | Brand Name | CMS MAGNETICS | | Color | silver | | Customer Reviews | 5.0 out of 5 stars 5 Reviews | | Item Diameter | 0.72 millimeters | | Item Length | 112 feet | | Item Thickness | 0.72 millimeters | | Item Weight | 0.18 kg | | Model Number | MW21-K4 | | Part Number | MW21-K4 | | Recommended Uses For Product | Speaker coils, transformers, inductors, electromagnets, Tesla coils, motors, and electrical applications Recommended Uses For Product Speaker coils, transformers, inductors, electromagnets, Tesla coils, motors, and electrical applications See more | | Unit Count | 4 Ounce | | Wire Diameter | 0.72 millimeters | ## Product Details - **Brand:** CMS MAGNETICS - **Color:** silver - **Material:** Copper - **No. of wires:** 100 - **Number of Cable Strands:** 100 ## Images ![CMS MAGNETICS – 21 AWG, 4-Ounce Spool, 112 Feet Long Enameled Copper Magnet Wire for Science, Speaker Coil, Transformer, Inductor, DIY Project - 392°F Working Temp, 1.6A Rated Current - Image 1](https://m.media-amazon.com/images/I/51ZhF66fL7L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent wire! *by B***E on October 25, 2024* Exactly as advertised, this work is nice and stiff yet easy to manipulate. I use this work for repairing PCB traces and winding custom Rf coils. It is very high quality. Tip: a little bit of sandpaper will easily remove the enamel insulation to make soldering easier. --- ## 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/616911749-cms-magnetics-21-awg-4-ounce-spool-112-feet-long](https://www.desertcart.sg/products/616911749-cms-magnetics-21-awg-4-ounce-spool-112-feet-long) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-09-12*