Sleeve wheel nuts to suit classic Revolution and Mamba style wheels which require a long sleeve and and a flat seating washer. Washers are included.Available in the following options:Option 1: 3/8" UNF thread , 11/16" OD sleeve x 30mm longOption 2: 3/8" UNF thread, 9/16" OD sleeve x 30mm longOption 3: 7/16" UNF thread, 11/16" OD sleeve x 30mm longOption 4: M12 x 1.5 thread, 11/16" OD sleeve x 30mm long