O-ring for Bing 4mm inner diameter 2mm cord thickness black for Zündapp KS 80, Hercules Kreidler Puch, Prima GT, GX, DKW, KTM, H

Bing carburetor O-ring seals suitable for Zündapp KS 80, Hercules Kreidler Puch, Hercules Prima GT GX, and many other models with Sachs 501 engine such as DKW, KTM, Horex moped, moped, mokick. Technical details: Inner diameter 4mm, cord thickness 2mm. Image No. 8 and Image No. 7. Part number: 65-704.