RV Window Screen clips.
Looked all over for these things that slip on frame of RV Trailer window and hold screen in. Found them on amazon but they wanted $25 bucks for 10 of them which seemed like a lot. Designed these to replicate the original clips and they work perfect. Can print a bunch of them at once for extras if you lose or break more later.
Prints quick and clean standing up on side with no supports needed.