NEWELEMENT 1 Cu
  V0 2.476000000000000
  kappa 5.177849688157389
  eta2 3.121827622202922
  n0 0.061409847696671
  mass 63.545999999999999
  S0 1.412903124000000
  E0 -3.510000000000000
  lambda 3.601818067747439
ENDELEMENT -1
STOP -1


(anything below the STOP line is ignored)

These are the default EMT parameters from ASAP.  
Units are based on eV, Angstrom and atomic mass units.
The mass parameter will not actually be used by the KIM calculator.