This is a replacement bracket that connects the headrest to the spa body on the Bullfrog M8 spa. The stock part is a translucent plastic that is a bit flimsy and prone to breaking. This replacement is thicker on the walls, and has a more substantial and solid connection between two the two sides. It feels more solid when raising the headrest compared to the stock part.
I printed mine with transparent PETG, which mostly came out pale white color, which actually blended in well with my white spa color.
I printed it with 6 side walls for strength and about 40 percent gyroid infill, which is very solid.
The author marked this model as their own original creation.