Solderless Breadboard Assembly 3220 — Pro Series with Jumper WiresSolderless Breadboard Assembly 3220 Pro Series with Jumper Wires A 3220 point solderless breadboard assembly from the Pro Series, bundled with a jumper wire kit the largest standard breadboard size combined with the highest contact quality available. The Pro Series features premium phosphor bronze contacts with a binding force exceeding 80g per contact, delivering lower contact resistance, more secure component retention, and a longer rated service