Nuova Simonelli 360 Steam Wand Lower 'O'-ring. It has the same dimensions as part R_80, but is o-ring 0115 EPDM instead of Viton®.
This is not the steam tip o-ring - please check here for the steam tip: S_778
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.