- Forged chromoly lower cup - 12mm Deep Cup 6061/T6 upper cup - Super oversized japanese Sealed lower bearing - FSA ACB 36/36 upper cartridge bearing - Forged chromoly crown race - Gyro compatible - Laser etched aluminium top cap - 1 1/8" size only - Stack height 16 + 13.5 = 29.5mm - Black finish - Weight 180 grams FSA Part number 141-2005 Not sure if this is the one you need? Check out the handy FSA Headset ID Tool here http://www.fsaeasyheadset.com/