Frame SN: F404D1028 Felt Race Road UHC Ultimate Nano carbon fiber, ADK Composite technology w/ InsideOut construction, carbon fiber dropouts, press fit carbon BB shell, replaceable rear derailleur hanger, electronic compatible internal Di cable ports. Fork Felt Race Road UHC Ultimate carbon fiber monocoque construction, ControlTaper 1.125" - 1.5" carbon fiber steer tube w/ integrated crown race, crown, blades & dropouts Bottom Bracket:FULL CARBON , NOT ALUMINUM.Press fit or compression Headset FSA NO.38/42, 1.125" - 1.5" sealed cartridge bearing w/ Felt VariableHeight Cone Spacers (20mm PC, 4.5mm aluminum), 1x 10mm + 2 x 5mm PC headset spacers, Felt compression device, carbon fiber top cap & aluminum bolt **entire carbon part is 9/10 condition with only the aluminum layer that protects the frame from chain whip behind the crankset got scratch but it serves its purpose - to protect! But very shallow and didnt penetrate underneath. Can not mention any scratch, torn or cracks whatsoever- very nice condition and well protected!