-lips fit to the CNC chamber, provide perfect seal around the nozzle.
-no need of any tape or other addition to acchive sealing (can be added but nor required)
-external and internal dimensions changed to fit perfectly in both standard and F.A.S.T. chambers
-made of a more durable industrial rubber compared to silicone ones (it does not need to be soft and grippy since it dosn’t provide backspin)
-flat inside to make it R-hop ready (and required
-internally designed for PDI specs, probably fit most other barrels R-hoped
-increased hardness to expand pressure on the whole R-hop
-NOT suitable for Laylax/Prommy barrel

Wolrdwide priority shipping: 3$/package