ITEM NAME:1" to 1-1/8" Threadless Quill Stem Adapter Bike Bicycle Replacement Stem Adaptor Description: Made of aluminum alloy material, it is sturdy and durable. Raises the height of your handlebars by increasing the height of your stem. Converts a threaded quill setup to threadless. Used for diameter 28.6mm bicycle fork Tube. Specification: Material: aluminium alloy Length: 15cm / 5.9inch Small head: 22.2mm; Large head: 28.6mm Stem fitting 28.6mm / 1 1/8" Package Includes: 1 Piece Bicycle Quill Adapter SKU: DMO0009429954022016.Converts a threaded quill setup to threadless. 1 Piece Bicycle Quill Adapter. Raises the height of your handlebars by increasing the height of your stem. Stem fitting 28.6mm / 1 1/8". Small head: 22.2mm; Large head: 28.6mm.