Regensburger Bratwurst was invented in the late 19th century and only sausages that are produced in the inner city ring may be called "Regensburger". The sausages are made from fine or coarse pork and they're smoked and boiled, comes in a compact shape with a length of about 10cm and a diameter of about 4cm. The pork is usually finely ground without fat, then mixed with spices, salt, and small chunks of pork.
Once cooked, they can be served hot or cold, or used in dishes such as salads or sandwiches. The local name for the sausages is "Knacker", which can be translated as "cracker" or "crackler".