Overview
This 140-piece U-shape jumper wire kit is made of solid-core wire pre-bent into flat staples at standard breadboard spacing. Unlike floppy flexible jumpers, these press flush against the board and route in neat right angles, so your circuit stays tidy and easy to follow. They are perfect for clean breadboard builds, demos, and photos.
The kit includes 14 different lengths in color-coded sizes, covering everything from one-hole hops to long rail-to-rail runs. They work on any standard 2.54mm breadboard alongside Arduino, ESP32, Raspberry Pi, and Pico projects.
At a Glance
Pieces
140
Type
Solid-core, pre-formed
Lengths
14 sizes
Spacing
2.54mm multiples
Gauge
~24 AWG
Fits
Standard breadboards
Specifications
| Parameter | Value |
| Quantity | 140 pieces |
| Conductor | Tinned copper, solid core |
| Wire Gauge | ~24 AWG |
| Length Range | 14 lengths, ~0.1in to ~2in spans |
| Pin Pitch | 2.54mm (0.1in) multiples |
| Tips | Square pins, pre-stripped |
| Color Coding | By length |
How to Use
Pick the wire whose span matches the gap between the two breadboard holes you want to connect, then press both ends straight down into the holes. The wire lies flat against the board.
| Step | Action |
|---|---|
| 1 | Count the holes between your two connection points. |
| 2 | Choose the matching length (colors group by size). |
| 3 | Press both square pins fully into the breadboard. |
| 4 | The wire seats flat, leaving the board open and readable. |
Tip: Keep power rails and signal runs at different lengths/colors so your wiring reads at a glance. These wires are reusable - pull straight up to remove without bending.
Frequently Asked Questions
How are these different from flexible jumper wires?
These are solid-core and pre-bent, so they lie flat and hold their shape for clean, professional-looking breadboard layouts. Flexible Dupont wires are better for connecting boards and modules that are not on the breadboard.
Can I reuse them?
Yes, many times. Pull them straight up to remove. Avoid repeatedly bending the pins, which can fatigue the wire over time.
Will they fit any breadboard?
They fit any standard 2.54mm (0.1in) pitch breadboard, which covers virtually all hobby breadboards.
What do the colors mean?
Color indicates length, so you can grab the right size quickly. They are not tied to voltage, though you can adopt your own convention (for example red for power).
What current can they carry?
As ~24 AWG solid wire they comfortably handle typical breadboard logic and small loads up to a couple of amps. For higher current use thicker dedicated wiring.