
Updated December 2017: The seller was very aggressive in trying to fix everything as I had to modify the product a bit to make it work. The seller refunded part of the purchase price for my request. Even the blocks I removed the shrink tubing from still work fine. It's nice to see an attentive seller! Adding a star (up to 4) for their efforts. Original Review: With these items, you will notice a "shrink tube" covering the outside. Unfortunately, the shrink tubing runs too deep on the external thread and the adapter does not sit fully in the socket. After the first 2 failed I cut the tubing to about 1/4" or 3/8" and they worked fine.