The 503-44TS is a four-pole terminal block connector manufactured by Oupiin Inc. It features screw terminals that are easily connected, allowing both high current and low current electrical connections. The terminals are gold-plated and feature a high-resistivity carbon core. This makes them corrosion-resistant and allows them to carry up to 10 amps of current. The connector also features terminal markings, which help with wiring installations. This connector is commonly used in industrial, scientific, and commercial applications.