Leviton offers a complete line of 2, 3 and 4-wire straight blade plugs and connectors for Industrial, commercial and residential use. Leviton plugs and connectors are designed to withstand impact, corrosion and chemicals. Residential grade plastic devices resist grease, oils and acids. Leviton Plugs and connectors are rugged and easy to wire. They are offered in polarized and non-polarized versions and in all NEMA configurations.