Feature:1. The delay solenoid valve is equipped with a check valve, which can replace for OTS air compressor accessories2. Solenoid valve is sensitive, nonstuck, durable and airtight, possess excellent performance3. Support simple operation, the red and black cables are both positive and negative, and can be used after connecting to the circuit4. Come with electric drive mode, safe to use, possess stable structure and long service life5. The interface thread diameter is 16mm and 14mm, flexible and can be adapted to many machinesSpecification:Item Type: Electric Solenoid ValveModel: Delay solenoid valve + check valveMaterial: Plastic + aluminum alloyInterface Thread Diameter: Approx. 16mm / 0.6in(big), 14mm / 0.6in(small)Drive Mode: ElectricPurpose: Silent oil-free machine accessories.Package List:1 x Electric Solenoid Valve