diff --git a/app/models/p_spec_value.rb b/app/models/p_spec_value.rb
index 8471de5..c9aade6 100644
--- a/app/models/p_spec_value.rb
+++ b/app/models/p_spec_value.rb
@@ -1,7 +1,7 @@
 class PSpecValue < ApplicationRecord
   has_many :p_product_ref_specs
 
-  UNITS = ["Go", "Mo"]
+  UNITS = self.distinct.pluck(:unit)
 
   def member_label
      "#{value} #{unit}"