diff --git a/magnet/magnet_v22a.geo.root b/magnet/magnet_v22a.geo.root
index d379c78fc03f0a976a8ec5ce2cbd5c3e206c4c94..ca36b55ff06c0b7fb6a74a8056a84ac6289b5414 100644
Binary files a/magnet/magnet_v22a.geo.root and b/magnet/magnet_v22a.geo.root differ
diff --git a/magnet/magnet_v22a.info b/magnet/magnet_v22a.info
index 7a239fd40c30bea226e920a0be29afc760f0f719..70ba3d3382515f6710373be8934db824a0bc0aa2 100644
--- a/magnet/magnet_v22a.info
+++ b/magnet/magnet_v22a.info
@@ -17,6 +17,6 @@ The clamps are elongated in x but the positioning is maintained.
Default geometry to be used as the clamps are to be used with and without the rich detector.
The only acception when the MUCH is used when the other magent geometry is to be used.
-
+Unique materials are now defined inside the gdml script which is also copied to the media.geo
diff --git a/magnet/magnet_v22b.geo.root b/magnet/magnet_v22b.geo.root
index f4ca6905a9661799394fd96be115c4e01ba51ff2..ebd3da716bdc6006732212891f2fda320edfa55c 100644
Binary files a/magnet/magnet_v22b.geo.root and b/magnet/magnet_v22b.geo.root differ
diff --git a/magnet/magnet_v22b.info b/magnet/magnet_v22b.info
index 810afb70249f47f9c59f451151e1d45c97ffda1a..b7e96254475804e3a4bbf449df133c0bdf94d69f 100644
--- a/magnet/magnet_v22b.info
+++ b/magnet/magnet_v22b.info
@@ -15,6 +15,6 @@ It enlarges the width of the apperature and entire gometry by 30cm in the x dire
It enlarges the height of the apperature and entire yoke by 3cm in the y direction (height).
The clamps are elongated in x but the positioning is maintained.
-
+Materials are now explicitly defined in the gdml script.
diff --git a/media.geo b/media.geo
index 8eb157487b22c4f7aff2a33cf8e3786ae27f3496..e1330af15f8de9cbcb8db5f6054667bfe9821649 100644
--- a/media.geo
+++ b/media.geo
@@ -1253,6 +1253,30 @@ RICHPad -2 12.01 1.00797 6. 1. .717e-3 1 4
9.393 0.0 1.0 1.00051
9.538 0.0 1.0 1.00051
+
+
+// --------------------- MATERIALS USED IN THE MAGNET (DEFINED ALSO IN GDML HEADER ) ----------------------------------
+
+MAG_Iron 1 55.847 26. 7.874
+ 0 1 20. .001
+ 0
+
+
+MAG_Copper 1 63.546 29. 8.96
+ 0 1 20. .001
+ 0
+
+MAG_Air 1 14.6873 7.32 0.001205
+ 0 1 20. .001
+ 0
+
+MAG_Vacuum 1 1.0 0.5 0.000000001
+ 0 1 20. .001
+ 0
+
+
+// --------------------- MATERIALS USED IN THE MUCH --------------------------------------------------------------------
+
MUCHiron 1 55.847 26. 7.87
0 1 20. .001
0