Nitto's Technomic Quill Stems are gravity cast aluminum and come in a range of extensions.
The quill (the part that goes into the fork steer tube) is 22.2 mm in diameter or nominally 1 inch and is 225 mm long (helpful for those needed higher bars)
25.4 clamp size
~345 Grams
72 Degrees
225 MM Quill
Gravity Cast Aluminum