diff --git a/app/models/item.rb b/app/models/item.rb
index 333f016c..fd7e7d01 100644
--- a/app/models/item.rb
+++ b/app/models/item.rb
@@ -65,6 +65,16 @@ class Item < ActiveRecord::Base
     condition = i[:rarity_index].in(Item::NCRarities).or(i[:is_manually_nc])
     where(condition.not)
   }
+  scope :is_pb, -> {
+    Item.joins(:translations).where('locale = ?', 'en').
+      where('description LIKE ?',
+        '%' + Item.sanitize_sql_like(PAINTBRUSH_SET_DESCRIPTION) + '%')
+  }
+  scope :is_not_pb, -> {
+    Item.joins(:translations).where('locale = ?', 'en').
+      where('description NOT LIKE ?',
+        '%' + Item.sanitize_sql_like(PAINTBRUSH_SET_DESCRIPTION) + '%')
+  }
 
   def closeted?
     @owned || @wanted
diff --git a/app/models/item/search/query.rb b/app/models/item/search/query.rb
index bc77a838..6bb41f64 100644
--- a/app/models/item/search/query.rb
+++ b/app/models/item/search/query.rb
@@ -44,6 +44,8 @@ class Item
               filters << (is_positive ? Filter.is_nc : Filter.is_not_nc)
             when 'np'
               filters << (is_positive ? Filter.is_np : Filter.is_not_np)
+            when 'pb'
+              filters << (is_positive ? Filter.is_pb : Filter.is_not_pb)
             else
               message = I18n.translate('items.search.errors.not_found.label',
                 :label => "is:#{value}")
@@ -114,6 +116,14 @@ class Item
       def self.is_not_np
         self.new Item.is_nc, '-is:np'
       end
+
+      def self.is_pb
+        self.new Item.is_pb, 'is:pb'
+      end
+
+      def self.is_not_pb
+        self.new Item.is_not_pb, '-is:pb'
+      end
     end
   end
 end