UPPER - MR040 (TH873DJ) - 30.15 x 41 x 7.3 - 36/45. LOWER - MR019 (TH073DJ - 40 x 51.8 x 7.5 -36/45. FSA Headset Bearings. Headset bearings. Headset Bearing Kits. Individual Headset Bearings. Acros Headset Bearings. ).
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