Product review (3 stars): buying online is not always good. It an item is inferior or does not ...
This item is okay. It extends under a table to direct the heat into the room. However, it is not wide enough to cover the entire heat register--older home on a slab with 14" floor heat ducts. The major home improvement stores do not carry this type of extender; otherwise, I would have purchased retail.  Unfortunately, buying online is not always good. It an item is inferior or does not fully fit, then you have the return shipping and restocking costs.