SMC VQ2000-FPG-C6C6 is a double check block (pilot-operated check valve assembly) sold in Lot of four

Its purpose is to lock air in a cylinder and maintain position, even if the directional control valve shifts or air pressure is interrupted. Series: VQ2000 Type: Double Check Block Fittings: 6 mm one-touch fittings on both inlet and outlet sides (C6-C6 designation). Function: Holds a pneumatic cylinder in position for extended periods by preventing backflow of air. Application: Used with VQ-series 4-way/5-port solenoid valve systems in industrial automation.