Stackable Test Plugs 4mm – Red Safety Banana Plugs

These 4mm Red Stackable Test Plugs are high‑quality, safety‑sheathed banana plugs designed for building custom test leads and electrical connections. Durable and dependable, they are ideal for use in school science laboratories, physics lessons, and electronics teaching.

Each plug features a solder termination, allowing secure and permanent attachment of cables when assembling bespoke test leads. A rigid insulating sleeve fully covers the connector, helping to reduce the risk of accidental contact with live conductive parts during experiments.

The stackable design enables multiple leads to be connected from a single socket, supporting flexible circuit layouts and efficient use of power supplies and meters. Finished in red, these plugs are ideal for colour‑coded circuits, making polarity and connections clear for students.

Key Features

• 4mm stackable banana test plugs
• Safety‑sheathed design with rigid insulating sleeve
• Solder termination for secure custom cable assembly
• Stackable socket allows multiple connections
• Finished in red for polarity and circuit identification
• Compatible with standard 4mm laboratory sockets
• Durable construction for educational use

Ideal for School Science & Physics Lessons

Well suited to KS3, GCSE, and A‑Level physics and electronics, these stackable test plugs help students safely build and adapt circuits while developing confidence in practical electrical work.

• Constructing custom test leads for experiments
• Building and modifying DC and AC circuits
• Supporting investigations into current, voltage, and resistance
• Encouraging correct use of colour‑coded connections
• Using with power supplies, multimeters, and circuit boards

Safe, flexible, and classroom‑ready, these 4mm Red Stackable Test Plugs are an essential component for hands‑on electrical experimentation and effective science teaching.