This is a flag pole that can hold either flat or wavy flag plates. The flags I have designed can be found under my profile sage117 | Published - MakerWorld. 

I have a sphere flag pole topper. Round Flag Pole Topper - Sphere

update July 17, 2024 - moved seam to back 

Under my profile I have both a square flag pole Square Flag Pole by sage117 - MakerWorld and a round one, so you can choose whatever your preference is or print one of each. I provide difference thickness for the hole which the flag inserts on both models too. The smallest tolerance has worked for my flags but figured I would post some variance in case people needed.

The round pole prints oriented straight up and is usable straight off the plate. I have my print profiles set to variable layer height.