Module: 1.25 (M1.25) – Defines tooth size; distance between teeth.
Tooth Form: Straight or Helical (often left-hand).
Material: High-alloy steel, carbon steel, aluminum alloy.
Hardness: Basic, Tempered (HB200-250), or Hardened & Ground for high accuracy/heavy loads
Face Width: e.g., 22mm.
Height/Thickness: e.g., 25mm.
Length: 150cm