ISO D Die Spring, Medium Duty, Color Blue, Chrome Silicone Alloy Steel, Finish Powder Coat, Overall Length 1 In., Outside Dia. 3/8 In., End Type Closed & Ground, For Hole Size 3/8 In., For Rod Size 3/16 In., Spring Rate 89.6 lb./in., Meets/Exceeds ISO10243, Package Quantity 10