The Signet has a 24mm thru hole (for use with 24mm cranks) and comes  with both 22mm and 19mm adapter hat washers.

Fits 19mm, 22mm, & 24mm axles: Bore size is 24mm and supplied with 19mm & 22mm adapters.

Specifications:

• Color: Black
• Size : 28T
• 6061 Aluminum
• Bolt on style only
• Made in the USA by Profile Racing
• Weight: 77g/2.70oz