This should be used with equipment that is really old, or is suspected to be warped or otherwise damaged: the paper material is very forgiving on questionable surfaces, unlike the PTFE version gasket. It should be noted that this type of gasket can be very difficult to remove after it is compressed for a long period of time. 63 x 48 x 2 mm. Discontinued by Rancilio.
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.