It is an 80mm Y with 3mm walls 45 degree angle and Equilateral

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3817056.

someone on facebook wanted this so I spent 4 minutes on it... it should print fine with a brim. took me longer to upload than make... internal diameter 80mm outer diameter 86mm so 3mm walls 2 versions one asymmetric with 45 degrees and one equilateral