Consists of a body and diaphragm made out of stainless steel (SS 316L). ABS adjusting device to move with the supplied key or screwdriver. Rubber measuring tappings for connection to a pressure gauge. Class «C» air tightness. Diameters 80 up to 800 mm (please consult for other dimensions).Gaskets for tight connection with the duct. Service temperature from -10 °C to +80 °C.