diff --git a/TZPGcalc.py b/TZPGcalc.py
index 5c230b86cc047d9724fbd5361ae968bc74e6595b..567d5914bb7934571f05b8a397f7000d695bdba0 100644
--- a/TZPGcalc.py
+++ b/TZPGcalc.py
@@ -50,12 +50,24 @@ TZPG_db = {
         'TZPGwV': 0.8,
         'TZPGoffaxis': 0.55,
         'grating': 3.1},
+    'Co': {
+        'design_nrj': 785,
+        'TZPGwH': 0.8,
+        'TZPGwV': 0.8,
+        'TZPGoffaxis': 0.55,
+        'grating': 3.1},
     'Ni': {
         'design_nrj': 860,
         'TZPGwH': 0.8,
         'TZPGwV': 0.8,
         'TZPGoffaxis': 0.55,
         'grating': 3.1},
+    'Cu': {
+        'design_nrj': 927,
+        'TZPGwH': 0.8,
+        'TZPGwV': 0.8,
+        'TZPGoffaxis': 0.55,
+        'grating': 3.1},
     'Gd': {
         'design_nrj': 1210,
         'TZPGwH': 0.8,