These are to replace the broken covers for a tap like the one in the picture.
I printed them in grey/silver to try to match the tap, but I think you could do red/blue too.
Unfortunatley I don't have the brand or model of the tap as my it was in the house when my friend moved in.
Recommend printing in PETG with support and the curved surface facing upwards.
The author hasn't provided the model origin yet.