New ergonomic handle, factory cut, Original Equipment Manufacture bottomless portafilter, designed specifically for the RS1 model. This comes with the spring, but no basket is included; Rancilio recommend the 40100108.
Will fit any Rancilio group head.
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.