Dan Kubin New Black Nipples

From DK:
I am exited to release these new nipples.
 I designed them to hold up to the aggressive nature of hard hitting machines such as my Sidewinder and Swingliner.  Made from the most durable rubber I could find.  They are nice and firm.

 I now modified the outside profile for a little bit of a radius at the shoulder.  This will help keep it strong where it needs it most. (Similar time how the old black nipples were).
They have a tapered inside diameter, so as it is pressed onto the post the nipple spreads itself around the needle loop for a secure fit.  My favorite part of this style of secure fit is that the nipple isn't stuck to the needle when removing it from the machine.