Aeroquip FCA0415 #4 Hose 15′ Air Brake Compressor Discharge Hose Connector. EST, MON to FRI. Brake > Electrical Connectors > Air Brake Compressor Discharge Hose Connector. Aeroquip FCA0415 #4 Hose 15. Aeroquip – FCA0415 – #4 Hose 15′ – Hose – AQP Racing Hose – 4 AN – 15 ft – Braided Stainless / Rubber – Natural – Each.