Material si constructie Membrana: Cauciuc siliconic tip VMQ Calota: Plastic PA6 (pt. DN 15-20), alama tip CW617N (pt. DN25-32) Capac: Plastic PA6 Placuta de timbru: Plastic PA6 Conectori cu filet interior: Conform ISO 228-1 Corp: Alama forjata tip CW617N