Our aftermarket Irmscher Valve Caps are a simple and cost effective upgrade and the perfect finishing touch for your Vauxhall, Opel or any other Irmscher styled vehicle. As well as adding aesthetic appeal to your wheels, the main purpose of a valve cap is to protect the tyre valve itself from dust, dirt and moisture ingress, as well as preventing tyre pressure from escaping. These valve caps are also often referred to as Irmscher dust caps or Irmscher valve stem caps.