CLONE 15mm Bing carburetor.
Replaces the 12mm Bing you most likely have on your Puch moped. Install it on whatever you want though. We won't stop you.
20mm ID on the clamp side. 20mm OD on the airbox side.
These have weird atomizers that use Square Bing jets. You should probably swap the atomizer out of your old round Bing so you can use round Bing jets.
This is a clone carburetor- not OEM Bing. Probably take it easy when your bolting everything up.