Original genuine Odyssey Dynatron headset. Comes with 26.4mm fork race. Some old school forks use 27.0mm, if that is the case it’ easy enough to file or Dremel it out. Better a tight fit than too loose. 

Colour: Silver/Black 

Crown Race: 26.4 

Stack Height: 35 mm 

Bearing Type: 5/32" Ball Headset 

Type: 1" BMX. (32.7mm cups) 

Weight: 144 g 

Material: Steel 

Steerer Tube: 1" Threaded