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)
As always if you are unsure of which stem you need, shoot us an email and we are happy to help.
25.4 & 26.0 Clamp sizes
225 MM Quill
Gravity Cast Aluminum
The 80mm stem weighs about 345 grams, the 100 mm stem weighs about 365 grams. Extrapolate away.