Check the listing for details. FSA The Pig Threadless Headset 4 29 Silver Oversized Bearings 6061 Chromoly. Color: Silver, Condition: New. Listed at 26.00 USD. The FSA The Pig threadless headset is constructed of chromoly and features 1/4" ball bearings.Forged chromoly lower cup. 12mm Deep Cup 6061/T6 upper cup. Super oversized lower ball bearings. Caged 5/32 ball upper bearings. Forged chromoly crown race. Gyro compatible. Laser etched aluminum top cap. Black or silver anodized finish. Item Specifications: Bearing Type, Cup and Cone, Color, Silver, Defined Color, Silver, Upper Stack Height, 15.4mm, Lower Stack Height, 13.6mm, Crown Race, 30, S.H.I.S Lower, EC34, S.H.I.S Upper, EC34, S.H.I.S. Stem Clamp Diameter, 28.6 Threadless, SHIPS TODAY! Order before 1:30PM EST, M - F, and this item ships the same day! HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us