Most expensive caps on earth I imagine.
Farmertec includes them on their MS290 replacement crankcases which for some reason cost twice as much as any of the others and despite my offer to buy 2000 of them at whatever price they wanted to name, they wont/can't sell them separately.
So after shipping and customs they run me about $48.00 for a pair, but they are flippy caps that don't flip, you just twist them in and they lock.
no idea what is really going on in regards to this but they look cool on a saw and we all know looking cool makes a saw fast and powerful
Dave