Neco 1-1/8" Threadless MTB/ATB/Trekking Bike External Cup Headset 34mm Headtube (Silver)
Use for 1-1/8" (28.6mm) Stem Headtube ID.: 34mm Crown Race: 30mm SHIS NORM: EC34/28.6 | EC34/30
Use for 1-1/8" (28.6mm) Stem  Headtube ID.: 34mm  Crown Race: 30mm  SHIS NORM: EC34/28.6 | EC34/30 Size: 1-1/8” Threadless Headset  Dimension: 1-1/8”x34x30  6061/T6 CNC Machined Top Cover with Seals  6061/T6 Forged CNC Machined Cups  Cold-forged Steel Crown Race  Cartridge Ball Bearings  Stack Height: 29 ± 1mm
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Neco
{"Item Package Dimensions L x W x H": "3.1 x 1.2 x 0.01 inches", "Package Weight": "0.14 Kilograms", "Brand Name": "Neco", "Part Number": "H711", "Date First Available": "March 31, 2016"}