This replaces a Puch SG handlebar plug and sits flush with the end of the grips. It should also fit a 125 or 175 SV handlebar - and may also fit other (Puch) models with handlebars with 18mm inside and 22mm outside diameter. Let me know if you tried it!
I printed the part in PETG with the larger outside part facing down, with a layer height of 0.2mm. I used 4 perimeters and a brim.
The author hasn't provided the model origin yet.