Die Spring, Extra Heavy Duty, Color Green, Oil Tempered Chrome Silicone, Finish Paint, Overall Length 11-13/16 In., Outside Dia. 2-3/8 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, Spring Rate 300 lb./in., Meets/Exceeds JIS SWOSC-V, ASTM A877