BOLITE 18058B Hand Blown Hummingbird Feeder, Blue, New

Are the red flower feeding ports removable? Squirrels and raccoons pull off the removable ones on my current feeder.

Odd question: does this have little rubber "tubes" inside each feeding port or are there just holes for the hummers to stick their tongues in?

Can anyone suggest the correct wasp guards for these tips by chance on these feeders ?

What are the actual dimensions of the feeder (not the package) with respect to height and circumference?