Notice!In order to facilitate the purchase, we've added the choice of individually procuring the polyurethane pad and the option of processing the keyway. If you simply take those two options, you will not get an entire coupling. Including: OD:14mm Length :22mm CF flexible coupling Descriptions: D (Outside diameter): 14mm L (Inside Length): 22mm Material:Auminium alloy Sleeve Material: Polyurethane