Die Spring, Extra Heavy Duty, Color Red, Oil Tempered Chrome Silicone, Finish Plain, Overall Length 6-7/8 In., Outside Dia. 1-3/16 In., Wire Dia. N/A, End Type Closed and Ground, Large Outside Dia. 0.360 In., Small Outside Dia. 0.125 In., Compressed Length N/A, Deflection @ Load 0.06, Spring Rate 4 lb./in., Meets/Exceeds JIS SWOSC-V, ASTM A877