FloMAX Standard Series connectors consist of 4 color-coded non-interchangeable dispensing nozzle/coupler and receiver sets (Coolant, Engine, Hydraulic & Transmission) which are fully compatible and interchangeable with other industry standard connectors. The color-coded and labeled mating components provide for quick positive identification while the proprietary design helps prevent cross contamination from the fluids of non-mating connectors. These connectors are manufactured using 100% metal components. All wear components are electrolysis nickel-plated steel for added lubricity and durability, while the non-wear components are aircraft grade anodized aluminum. The billet aluminum caps are O-Ring sealed for greater contaminant resistance.