This tip comes with an adaptor to fit the female thread steam wands found on Simonelli's newer equipment, or you can use them without the adaptor to thread onto the male thread wands, such as are found on the Oscar model. They are not suitable for older models such as the MAC, Program or Program VIP. O-ring not included.
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.