These iron and aluminum rods are suitable for use in electromagnetic experiments and electrolyzer science projects. Their high conductivity and precision make them suitable for a wide range of applications, including coil winding and electromagnet core construction. They are essential for achieving accurate and reliable experimental results. Features -Color:Assorted Color -Material:Iron, Aluminum - Size: 6.50X0.80X0.80cm/2.55X0.31X0.31in -Precise water testing: this water quality electrolyzer rod delivers accurate water purity measurements, providing you with reliable data on your drinking water quality -Sturdy and durable: made from durable iron and aluminum rods, this electrolyzer rod is designed to withstand repeated use, ensuring long term reliability -Wide range of uses: suitable for various environments, including homes, offices, and hotels, this electrolyzer rod is versatile and adaptable for different water sources -Easy to carry: its compact and lightweight design makes it easy to transport, allowing you to test water the go or during travel -Complete testing kit: each electrolyzer comes with iron rods and aluminum rods, comprehensive for water quality testing Package list: 2pcs aluminum rods, 2pcs iron rods