External cup aluminium headset for threadless 1 1/8" (28.6 mm) forksSize: 1 1/8" x 34 x 30For forks with outside diameter: 28.6 mm (1 1/8")For head tubes with internal diameter: 34 mmFor fork crown outside diameter: 30 mmFor stem inside diameter: 28.6 mm (1 1/8")Top fetures ball bearings for durability and bottom - needle bearings for smoother fork movement due to less frictionBall bearings: size - 5/32", quantity - 226061/T6 CNC machined aluminium cups and top coverSteel crown race11 parts: crown race, lower seal, 2 ball bearings, 2 cups, upper seal, compression ring, top cap, star nut, cap boltWeight: 155 gPacked in a boxHeadset parts placing from the bottom: Crown race, lower seal, ball bearings with needles up, lower cup, star nut, upper cup, ball bearings with balls down, seal, compression ring, top cap, cap bolt