Brand new FSA EC49 (also known as EC49.6 or EC49/40 ) external headset lower bottom cup assembly including bearing and crown race for 1.5" forks (one point five or OnePointFive).

Fits headtubes with inside diameter ~49.5mm and forks with steerer diameter at the crown of ~40mm

Forged and CNC machined aluminium cups, sealed cartridge bearing, aluminium crown race.

OEM spec so no packaging or manual but absolutely brand new and never fitted.

May be very small cosmetic marks from storage.