diff --git a/app/assets/images/pictograms/download-multiple-outline.svg b/app/assets/images/pictograms/download-multiple-outline.svg
new file mode 100644
index 0000000..24d0398
--- /dev/null
+++ b/app/assets/images/pictograms/download-multiple-outline.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" id="icon" viewBox="0 0 24 24"><path d="M12 14L19 7H15V1H9V7H5L12 14M12 11.17L9.83 9H11V3H13V9H14.17L12 11.17M5 16V18H19V16H5M5 22V20H19V22H5Z" /></svg>
diff --git a/app/models/unit.rb b/app/models/unit.rb
index 28b38ba..471bc5d 100644
--- a/app/models/unit.rb
+++ b/app/models/unit.rb
@@ -15,10 +15,11 @@ class Unit < ApplicationRecord
 
   scope :defaults, ->{ where(user: nil) }
   scope :with_defaults, ->{ self.or(Unit.where(user: nil)) }
-  scope :default_diff, ->{
+  scope :defaults_diff, ->{
     other_units = Unit.arel_table.alias('other_units')
     other_bases_units = Unit.arel_table.alias('other_bases_units')
     constraints = other_bases_units[:id].eq(other_units[:base_id])
+      .and(other_bases_units[:symbol].eq(Arel::Table.new(:bases_units)[:symbol]))
       .and(other_units[:symbol].eq(arel_table[:symbol]))
       .and(other_units[:user_id].not_eq(arel_table[:user_id]))
 
@@ -46,4 +47,8 @@ class Unit < ApplicationRecord
   def movable?
     subunits.empty?
   end
+
+  def default?
+    user.nil?
+  end
 end
diff --git a/app/views/default/units/_unit.html.erb b/app/views/default/units/_unit.html.erb
new file mode 100644
index 0000000..662a7ea
--- /dev/null
+++ b/app/views/default/units/_unit.html.erb
@@ -0,0 +1,19 @@
+<%= tag.tr do %>
+  <td class="<%= class_names({subunit: unit.base}) %>">
+    <%= unit.symbol %>
+  </td>
+
+  <td class="actions">
+    <% if current_user.at_least(:active) && unit.default? %>
+      <%= image_button_to t(".import"), "download-outline", import_default_unit_path(unit) %>
+    <% end %>
+    <% if current_user.at_least(:admin) %>
+      <% if !unit.default? %>
+        <%= image_button_to t(".export"), "upload-outline", export_default_unit_path(unit) %>
+      <% else %>
+        <%= image_button_to t(".delete"), "delete-outline", unit_path(unit),
+          method: :delete %>
+      <% end %>
+    <% end %>
+  </td>
+<% end %>
diff --git a/app/views/default/units/index.html.erb b/app/views/default/units/index.html.erb
index 321f6a0..52e6466 100644
--- a/app/views/default/units/index.html.erb
+++ b/app/views/default/units/index.html.erb
@@ -1,5 +1,9 @@
 <div class="rightside buttongrid">
-  <%= image_link_to t('.back'), 'arrow-left-bold-outline', units_path %>
+  <% if current_user.at_least(:active) %>
+    <%= image_link_to t('.import_all'), 'download-multiple-outline',
+      import_all_default_units_path, data: {turbo_stream: true} %>
+  <% end %>
+  <%= image_link_to t('.back'), 'arrow-left-bold-outline', units_path, class: 'tools' %>
 </div>
 
 <table class="main items">
@@ -12,6 +16,6 @@
     </tr>
   </thead>
   <tbody id="units">
-    <%= render(@units, partial: 'default') || render_no_items %>
+    <%= render(@units) || render_no_items %>
   </tbody>
 </table>
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 9f7e00c..6370bba 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -69,7 +69,10 @@ en:
       success: Deleted unit
   default:
     units:
+      unit:
+        delete_default: Delete default
       index:
+        import_all: Import all
         back: Back to units...
   users:
     index: