This is a scroll wheel replacement for the Bambu Labs Mouse Kit ( https://us.store.bambulab.com/products/wireless-mouse-components-kit-002 )
I created it so that the scroll wheel could be the same color as my buttons on the Amiga Tank Mouse enclosure. ;-) See the comparison pics above with the ‘standard’ black rubber scroll wheel, and the 3D-printed PLA part.  It looks amazing! And even though it's printed in hard PLA, with the knurled surface it works extremely well and is comfortable to use.

Here's a link to the “Amiga Tank Mouse” that I created this mix for ( https://makerworld.com/en/models/102163#profileId-108809 ), but it can be used for any mouse you build using the Bambu Labs Mouse Kit. 

I printed it in PLA on my Bambu X1-C printer at 0.18mm layer height, and it fit perfectly the first time.
Just remove the rubber scroll wheel and carefully press this scroll wheel into place (note that center opening is slightly bigger on one side than the other, so take note and press it on to the ‘hub’ carefully until fully seated in the middle).  It should lock into place securely with only moderate force.