Filler breathers, i.e. tank filler necks, from the SPB series for tank mounting with 45 to 101 mm cap diameter are a fundamental element of the STAUFF product group for hydraulic accessories. For filling and venting of hydraulic tanks. Allows permanent venting while protecting against contamination entering the system. Optionally also available with integrated valves for pressure application. Manufactured from rust-proof materials. Body and cap made of plastic: fibreglass-reinforced polyamide (PA).