I purchased the 25/25 cone in brass. It arrives in its own screw top tin (nice touch) & gives the tube a slightly different look. The majority of my tanks are silver & I’ll be able to use my s/s 25mm outer diameter beauty rings i have for my Dani 21700 until i afford to purchase the other 3 come sizes in the brass.

The Dani 25 reduction cones are available in 22, 23 and 24 mm,
These are designed to eliminate the step you would have if you ran a 22 mm tank on a 25 mm mod,
You simply unscrew the 25 mm cap and replace that with the size that you require,
This adds a nice smooth finish to the mod that makes it more appealing to the eye.
For something a little different they are also available in Brass just for that little different look.