Yanagisawa Tenor Sax Neck
991/981

$225

Straight from the Yanagisawa factory to you. Original equipment tenor neck.

You ask, what is a 981? I don't know. I just copied what was on the end of the plastic box which holds the Yani neck.
It says "ORNT9901", but then goes on to say "...991/981 TENOR NECK"
When I Google "Yanagisawa 981", I can only find the Yani 981 Sopranino. I could guess that the 981 was a short-lived model that preceded the 99x models and now only lives on as the sopranino.
But that is just me guessing.

Outside Diameter of the tenon is in the 27.50 - 27.52mm range (1.082 - 1.085 inches)
Length of tenor is around 21.75mm (0.857 inches)

Why do I give a range, like 27.50 - 27.52 mm? I use a high quality digital caliper, but the difference between measuring the O.D. snugly vs. putting pressure and cinching it down, can easily give variations of hundredths of a mm. I don't want to give a false sense of accuracy.