Kenneth; I installed DICO #60 surge brake, and a Compact Contolls solenoid valve. It comes in three parts the body #220814-R9, 12 volt coil #320617, valve 3508-2-8=0-000. cost about $50.00.Road ready, my Globetrotter '19 weighs about 3200 #. The brake works smoothly, no jerks. Bruce