Bare Copper Wire – 0.40 mm Diameter (28 SWG), 250 g Reel

This Bare Copper Wire is supplied on a 250 g reel and manufactured to a 0.40 mm diameter, equivalent to 28 SWG (Standard Wire Gauge). Extremely flexible and highly conductive, this fine‑gauge wire is ideal for delicate electrical work, precise coil‑winding activities, and detailed circuit construction. Its bare copper surface ensures excellent conductivity and reliable contact with crocodile clips, binding posts, terminals, and other circuit components.

Light, easy to form, and smooth to unwind, this wire is perfectly suited for school physics and electronics investigations requiring thin, responsive conductors.

Key Features

• 250 g reel of bare copper wire
• 0.40 mm diameter (28 SWG)
• Excellent electrical conductivity
• Highly flexible and easy to shape
• Suitable for precision circuitry, small coil winding, and fine experimental setups
• Ideal for prototyping, repairs, and detailed classroom demonstrations

Ideal for School Science Lessons

A valuable resource for KS3–KS5 physics and electronics, this wire supports activities such as:

• Creating miniature electromagnets and delicate induction coils
• Building fine circuit connections and sensor setups
• Investigating resistance vs. conductor thickness
• Demonstrating how thin wires behave under varying electrical loads
• Supporting accurate measurement and low‑current experiments

An essential addition to any school laboratory, offering versatility and excellent performance across a wide range of physics and electronics practicals.