The P2532-1 is a 20.62mm Pogo? Test Spring Probe with contacts. The probe with gold-plated hardened BeCu plunger, gold-plated brass body, gold-plated BeCu spring and gold-plated stainless steel ball. The Pylon Pogo? Contact advantage comes in two unique design features that enable our Pogo contacts to achieve the lowest, most consistent contact resistance available in the marketplace. The biasing ball construction of the Pogo plunger.