Headset/headpart OXO HS-9 uses a semi-integrated system with steel material and ball retainer bearing.
Specifications of OXO HS-9
Upper Size: Outer Cup Diameter 44 mm, Thread Cover 1-1/8" Oversize
Lower Size: Outer Cup Diameter 44 mm, Inner Diameter 30 mm (Crown Race)
Material: Steel (Black Color), Ball Retainer Bearing
Product Weight: +/- 170 grams