SIP says:
"for Vespa 150 GS VS1-5T
- aluminium
- for engine conversion to GS150
- inner diameter: 31mm
- outer diameter: 36mm
- reed valve
- rubber connection
- for Quattrini M1XL conversion to GS150 engine block"
Product safety information
Manufacturer information:
SIP Scootershop
Marie-Curie-Str. 4
86899 Landsberg am Lech
Deutschland
info@sip-scootershop.de
https://www.sip-scootershop.de