just finished working around my parents house repairing an adding to there front porch. we added a hand rail and instead of going out a buying a post cap i used tinkercad to make this. i made them a few different sizes but i used the 50mm tale one, its whats pictured. for the depth of the holes i made mine fit what i needed to keep from having to cut the tops of the post off so one of mine was 22mm an the other was 30mm depth on the holes but they fit perfect. if u need something different an can't make these work let me know an i'll see if i can help out.