These accessories will fit both our pellet stove and our air conditioning brushes and will greatly facilitate all duct cleaning operations. If you are wanting to connect a heat exchange brush to one end of the fiberglass extension rods and a T-Handle at the other end, please make sure you get the correct T-Handle, Item# 06552. If you are wanting to connect the flex-connector Item# 06554 to a heat exchange brush and also use a fiberglass rod with a T-Handle, please make sure you get the correct T-Handle Item# 06552-1. If you order Item # 06553 the 36" extension rod it comes with a T-handle Item# 06552. You will not be able to use 06553 with the flex connector 06554 and a brush, you would need to also order order a separate T-handle Item# 06552-1 for it to work correctly.