Chris King Headsets Complete InSet 2 has 44mm upper internal cup, 56mm lower internal cup with 3.8cm Devo baseplate This vendor has requested that all vendors approve and file the required applications. Item Specifications Color Silver Material Aluminum Crown Race 39.7 Bearing Type Stainless Steel Defined Color Red SHIS Upper ZS44 SHIS Lower ZS56 SHIS Clamp Diameter 28.6cm