Hello, in a box I with Primus parts I bought some time ago I found a silent burner with no preheating cup. In the same box I found a preheating cup with a piece of pipe attached an it more or less fits the burner. Question now is do these parts belong together and if so, on which stove does this burner belong? Diameter of the burner is 6.5 cm and the height is 11 cm. Regards, Ton.