get pipe insulation dynamo revit

import clr

#Import the Revit API
clr.AddReference('RevitAPI')
import Autodesk
from Autodesk.Revit.DB import *

#Import DocumentManager and TransactionManager
clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager

#Reference the active Document and application
doc = DocumentManager.Instance.CurrentDBDocument

collector = FilteredElementCollector(doc).OfCategory(BuiltInCategory.OST_PipeInsulations).WhereElementIsElementType().ToElements()

OUT = collector