Double Grinder Adapater. 14/23 Outer to 14/23 inner, 90mm long.

Double Grind Adapter, 19/26 outer to 19/26 inner, 90mm long.

Double Grind Reduction Adapter: 14 female on top and 19 male on bottom. Change your existing fixed 19mm female to a 14mm female with this great little adapter!