M10 bolt, 65 mm in diameter, 45mm high. May also require the lower supplement, R_634. This part was used in the Millennium models as well, and can replace the old feet for the (out-of-production) S and Z series, part R_505.
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.