Protective Tubing Included. Each part has high-quality direct replacement electrical connector that eliminates the need for a harness, replacing only the damaged connector, for a cost effective repair solution. The terminals are manufactured with high grade materials such as copper alloy, brass, and phosphor bronze. The Housing is fabricated using polyamide resins. All of the materials together provide the connectors with prolonged life and superior performance in harsh environments. All electrical connectors are 100% tested for proper mechanical and electrical fit, form and function.