Passy-Muir Trach Ventilator Speaking Valve,Aqua Manufacturer: Passy-muir Inc ASIN B002ZUIQRM Size 11.25 inches Brand Name Passy-Muir Unit Count 1.0 Count Valve Type Check Valve Thread Size 15mm Thread Type 15mm Manufacturer Passy-muir Inc Model Number 1414333 Material Type Plastic Item Dimensions 11.25 x 9 x 1.5 inches Number of Ports 2 Inlet Connection Size 9 Inches Inlet Connection Type Flange Outlet Connection Size 9 Inches Outlet Connection Type Flange Manufacturer Part Number 1414333