Amazon.com: Multi Option Pneumatic Solenoid Valve Block With Muffler Fitting Base Manifold 2/3/4/5/6 Row 3 Port (Color : 4 Row 6mm fitting, Size : DC12V) : Industrial & Scientific
Amazon.com: Ridetech 31934001 RidePRO 4-way Solenoid/Air Valve Block used to Inflate and Deflate Air Spring Suspension Systems : Industrial & Scientific
Solenoid valve block for air supply systems | Rapa