Dorman 29004 HELP! Clutch Return Spring Assortment Overall length of 8-1/2 inch to 17-1/2 inch Coil diameter of 3/4 inch to 13/16 inch Coil length of 1-7/8 inch, 2-1/8 inch and 3-3/16 inch Wire diameter of 1/16 inch to 3/32 inch