Pretty close to Winmau Prism 1.0 shafts in dimensions. The slots for the flight is a lot tighter in comparison, but I'd those springs/washers come in handy. The flights stay put really well. The thread is different from Winmau products. I guess the "2BA" stands for something here, but I just can't tell for sure. However, you can screw these to Winmau barrels with some extra effort and due to the bad fit they do not come loose. Just don't expect to reuse them after unscrewing. I'm counting this as a huge plus.
Pretty close to Winmau Prism 1.0 shafts in dimensions. The slots for the flight is a lot tighter in comparison, but I'd those springs/washers come in handy. The flights stay put really well. The thread is different from Winmau products. I guess the "2BA" stands for something here, but I just can't tell for sure. However, you can screw these to Winmau barrels with some extra effort and due to the bad fit they do not come loose. Just don't expect to reuse them after unscrewing. I'm counting this as a huge plus.