Loose ball headset, great economy option for the workshop

HEADSET TYPE: Threadless External Cup
STEERER TUBE: Straight 11/8"
MATERIAL: Steel
STACK HEIGHT: 30mm
UPPER CUP: 34mm External Cup
LOWER CUP: 34mm External Cup
UPPER BEARING: 5/32" Retainer Bearings
LOWER BEARING: 5/32" Retainer Bearings

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Check out the handy FSA Headset ID Tool here http://www.fsaeasyheadset.com/