Droll Yankees 752913185724 OWF Observer Window Bird Feeder, 6.5"H, Clear

If the dome is lowered enough to allow cardinals, can the blue jays get into it? thank you!

I need to replace the suction cups for this feeder as they got lost over the winter. Can someone tell me what type/size to buy?

Where is this item manufactured?

Does this feeder keep out grackles and starlings?