The Miche Pista Sprocket Housing is a required piece to use your Miche Pista Steel Sprocket. It is ideal for track bikes and compatible with Miche Pista Hubs. The housing is made of a very durable steel that is sure to result in a long life. Please note that this product only includes the housing and does not come with a sprocket. The Miche Pista Sprocket Housing is essential for single speed riding with a 1/8-inch steel sprocket.