This is an adapter for the Anova Precision cooker 3.0 SousVIde, to fit a 2.5" hole. I was looking for a better seal throught the lid of my igloo cooler and did not feel the 2 3/8 hole with hard filaments adequatly sealed. So a slightly larger hole and using TPU with 2 walls and lightning infill provides a perfect seal. Feel free to extend the length to fit your lid.