Compression Spring, Conical, 302 Stainless Steel, Finish Plain, Overall Length 1 1/4 In, Wire Type Round, Wire Dia 0.049 In, End Type Squared and Not Ground, Large Outside Dia 0.975 In, Small Outside Dia. 0.500 In, LD @ 50% FREE LENGTH 3.56 Lbs, LOAD @ SOLID 6.56 Lbs, Spring Rate 5.69 Lbs/In, Meets/Exceeds ASTM A313