Red Emergency Glad Hand Part Number: 11451P (Same As Velvac 035042) Meets SAE J318 Requirements For Use On The Emergency Air Line Die Cast Aluminum 1/2" NPT Port Blue Service Glad Hand Part number: 11452P (Same As Velvac 035045) Meets SAE J318 Requirements For Use On The Service Air Line Die Cast Aluminum 1/2" NPT Port