Diatech (Dia-Compe) sealed bearing aluminum headset   * Color: SILVER ANODIZED * Size: EC34 (regular 1 1/8" threadless: 34.0mm cups, 30mm crown race) * SEALED CARTRIDGE BEARING * Split crown race * Stack Height: 12.25mm + 12mm = 24.25mm * Gyro Compatible (45.25mm max diameter of the upper cup - should work with most gyros) * Weight: 110g