Based on this product's specifications, here are some alternatives and similar models
Water Hose Fitting Kärcher 2.645-016.0
Summary description:
The Kärcher 2.645-016.0 water hose fitting is made of durable brass, ensuring long-lasting performance. This fitting is designed for easy connection and disconnection of hoses, providing a secure and leak-free seal. Ideal for garden use, it is compatible with Kärcher systems and enhances your watering efficiency. Pack includes 1 piece.