This is a brand new, unused item that has never been used since purchase. It has been stored indoors in a dark place for several years. The filter originally had some minor scratches. Thank you for your understanding. Manufacturer: Karcher ① Suction hose set (3m hose with disc strainer) Hose inner diameter: 15mm Body side thread diameter: 3/4 inch ② Filter (for self-priming, for mounting on the main unit) Please check the Karcher website for details on compatibility, etc.