You can buy apple core and segmenters, but I find they are usually a little small for things like a Pineapple. So I created this fruit segmenter to be able to handle larger fruit slices.

I just updated this with a couple additional segmenters. Now there's a medium (130mm) 8 segment and 12 segment tool, and a large (160mm) 8 segment and 12 segment tool. I found the medium segmenter worked for most pineapples, but there were few that were a little too big. I also felt like 8 segments were sometimes too large, so I added the 12 segment tool.

I recommend printing at 100%. That only takes an extra 4 grams, but should provide a lot more strength.