This is a brand new heavy duty 4-jaw hydraulic grease gun coupler.
This tip has a neoprene core which lasts longer than standard plastic in most tips.
Another benefit of this coupler is that it has 4 jaws instead of the standard 3 making it grip the grease fitting much better so it does not pop off while greasing.
Most importantly this grease tip has a pressure release valve to release pressure that occurs while greasing, especially with an electric grease gun.  Instead of fighting the pressure and possibly breaking the fitting or the tip you simply turn the end of the coupler one turn and it allows air through to release the pressure.
Last of all, this product is
NOT MADE IN CHINA
.  It is a heavy duty German Coupler and ships from the US.