Brand new fittings model EX6XLWSPLUS made by PPC 

These are the ones with the new Integrated CLEAR Port seal which ensures a moisture tight seal on all ports.

SignalTight® Aqua

Protection against loose connectors

Digital services are seriously impacted by loose connectors:

  • Pixilation and tiling of video
  • Reduced data speeds
  • Poor VoIP voice quality

SignalTight® achieves signal transmission approaching that of a fully-tightened connector, even if left loose:

  • Integrated clear port seal ensures proper moisture tight seal on every connection
  • Clear seal allows easy entry into a port
  • Knurled grip enhances ability to pre-tighten with fingers prior to wrench tight
  • Maintains ground continuity even when very loose
  • Reduces errors/packet loss
  • Prevents service issues from loose connections

Here is more info copied and pasted from somewhere...

RG6 Coaxial Connectors with AquaTight® EX® technology

These are the longer body approved XL fittings. EX6XLWS (PLUS)

The AquaTight® EX® Series is a revolutionary design concept that combines PPC's EX® Series compression connector with an integrated port seal. This innovative design guarantees the use of a port seal every time so that moisture migration problems are eliminated. The AquaTight® nut design also allows the installer to fully seat the connector on a port by hand, preventing connections which are still loose after a ¼ wrench turn.
  • These are the most premium Coax fittings on the market. PPC makes the highest grade longest lasting fittings of anyone.
  • They are approved by Dish Network, Directv, Comcast, Cox, Charter, At&t and many more.
  • They have washers (rubber booties around the fittings to keep water & moisture out so there is no corrosion) built on each fitting.
  • They fit every type of RG6 cable out there. Quad shield too!