This cap is mean for 10 mm optical path cuvette (spectrophotometer).

Important sizes:

10.2410.24 mm small area
12.2012.20 mm large area

This include a hole for nail pulling, in the four sides, 0.461.2 mm

It's a hollow piece, so you should use 100% infill.

You can print up to 169 per Ender 3 printing area.