diff --git a/product.py b/product.py
index 62d804c..c7436ba 100644
--- a/product.py
+++ b/product.py
@@ -24,11 +24,17 @@ _MAIN_TECNOLOGY = [('mecanico', 'Mecánico'),
                    ('hidraulico', 'Hidraulico'),
                    ('neumatico', 'Neumatico')]
 
+_MACHINE_TYPE = [('mobiliario_optico', 'Mobiliario óptico'),
+                 ('refraccion', 'Refracción'),
+                 ('medicio', 'Medicion'),
+                 ('accesorios', 'Accesorios')]
+
 class Product(ModelSQL, ModelView, metaclass=PoolMeta):
     'Product'
     __name__ = 'product.template'
 
     machine = fields.Boolean('It is machine')
+    machine_type = fields.Selection(_MACHINE_TYPE, 'Machine type')
     risk = fields.Selection(_RISK, 'Type risk')
     use  = fields.Selection(_USE, 'Use')
     biomedical_class = fields.Selection(_BIOMEDICAL_CLASS,