:: 1" size available as plug only, no top cap. :: 1-1/8" size available with or without top cap. :: Works with all fork materials -- titanium, carbon, aluminum and steel. :: Top lip has ~3mm stack height.
Use with optional black PDX TI top cap with laser etched PORTLAND TITANIUM text, or just the plug and bolt for use with the headset top cap of your choosing. Same price either way.