Compression Spring, Conical, 302 Stainless Steel, Finish Plain, Overall Length 3/4 In, Wire Type Round, Wire Dia 0.035 In, End Type Squared and Not Ground, Large Outside Dia 0.720 In, Small Outside Dia. 0.438 In, LD @ 50% FREE LENGTH 1.62 Lbs, LOAD @ SOLID 2.94 Lbs, Spring Rate 4.33 Lbs/In, Meets/Exceeds ASTM A313