Diaphragms are a type of industrial component rather than a specific brand, commonly used in various applications such as pumps, valves, and pressure regulators. They are typically made from flexible materials like rubber, silicone, or PTFE, and serve as barriers to separate or control fluids and gases. Diaphragms are produced by numerous manufacturers worldwide, including companies like Parker Hannifin (USA), Freudenberg Sealing Technologies (Germany), and Trelleborg (Sweden). These components are critical in industries such as automotive, pharmaceuticals, water treatment, and chemical processing. For specific brand-related information, it is recommended to consult industrial suppliers like Grainger or Radwell, which offer a wide range of diaphragm products from different manufacturers.