The Grote 6" 16-Gauge GPT Male Pin Female PL-3 Pigtail Adapter Plug perfectly connects 4" round and oval S/T/T lamps. This adapter plug features a male pin termination with a 90° male pin, allowing for male-to-female and female-to-male pin lamp termination. It is made with high-quality GPT materials for maximum durability and longevity. This Adapter Plug is the perfect choice for any lighting project with its reliable construction and versatile design. FleetPride is your First Click in Heavy Duty®.