Loose ball headset, great economy option for the workshop
HEADSET TYPE: Threadless Zero Stack Cup
STEERER TUBE: Straight 11/8"
MATERIAL: Steel
STACK HEIGHT: 8.9mm
UPPER CUP: 44mm Flush Cup
LOWER CUP: 44mm Flush Cup
UPPER BEARING: 5/32" Caged Bearings
LOWER BEARING: 5/32" Caged Bearings
Not sure if this is the one you need?
Check out the handy FSA Headset ID Tool here http://www.fsaeasyheadset.com/
FSA - #10 HEADSET