ITEM NAME:2PCS 10mm 12mm Pneumatic Restrictor Connector Valve Push in Type Description: Body Style: Speed Controller Union Straight Push-to-connect fittings on the inlet and outlet ports 10mm/12mm inner diameter. Knob for precise manual adjustment of flow rate Applicable Tube: Polyurethane and Nylon, Fluid Type: Air Only In-line air flow control valve for controlling the speed of low-speed pneumatic cylinders Specification: Material: Plastic Size: 10mm - Approx. 60x50x20mm/2.36x1.97x0.8inch, inner dia: 10mm/0.4inch 12mm - Approx. 73x55x22mm/2.87x2.16x0.86inch, inner dia: 12mm/0.47inch Package Includes: 2 Pieces Pneumatic Restrictor Valve.2 Pieces Pneumatic Restrictor Valve. 12mm - Approx. 10mm - Approx. Applicable Tube: Polyurethane and Nylon, Fluid Type: Air Only.