Gas burner caps used on Ikea gas hobs and cookers.
IMPORTANT! All Ikea products are branded, which means that even two models sat beside one another in a showroom may not be the same or even be made by the same manufacturer, they are only sold under the Ikea brand. This means that the model number is vital to get correct and in many cases, the serial number may also be required to correctly identify parts in any particular machine so, if you are not sure, please ask for help.
Finding Ikea spare parts for ovens, cooker and hobs can be hard as they are often very specific to a model or even a production run, even if they look alike and are about the same sizes it doesn't mean that they are correct.