4-1/2inch Overall Length[Hook to Hook]7/10inch Coil Diameter,Wire Diameter 2.31mm1-9/10inch Coil Body [21 Turn]Mechanism assist / lock / tension springReplacement spring for your Recliner Mechanism and others Specification: Replacement Recliner Mechanism tension spring 4-1/2inch. 1-9/10inch barrel coil. 7/10inch Coil Diameter. 90degree off set hooks 21 coils. Long hook protrudes from coil 2inch We are committed to provide perfect products and services for you please contact us via Amazon if you feel in any way unsatisifed, we will try our best to help you to solve the problem.