Short rig sail users?

Thanks a lot. This is what I could see too, but I was not sure, if the dimensions are correct, because on RobK's Photo there was a plug with "1 1/4 inch" written on the top.
Okay, When you ordered exactly this item, the plug has 2 inch head diameter and is made for tubes with 1.84- 1.93 inch inner diameter ("ID").
I will try that.
Best Greetings from Germany