I present to you a silent burner for Primus Optimus 8R. Suitable for other Optimus models, if the thread of the fitting is the same, then for Svea 123. (I don’t have Svea 123, I can’t check). The burner is made on the basis of the head of the Soviet primus "Bumblebee", modernized and adapted for Optimus 8P and 99 stoves. Each silent burner is installed and adjusted on a bench. Careful selection and setting of each burner in different modes. The burner works great. The delivery set includes only the burner assembly - cup, separator and sprayer. Primus - not included in the lot. If you have any questions or concerns, I will be happy to answer. Dispatch with identification number - the next day after payment. Let me remind you that any gasoline stove works by heating gasoline vapors. That is, in a heated state. A cold Primus will smoke and burn like a torch. With respect to everyone.