Compression Spring Conical 302 Stainless Steel Finish Plain Overall Length 1/2 In Wire Type Round Wire Dia 0.040 In End Type Squared and Not Ground Large Outside Dia 0.720 In Small Outside Dia 0.438 In LD @ 50% FREE LENGTH 2.37 Lbs LOAD @ SOLID 3.98 Lbs Spring Rate 9.47 Lbs/In Meets/Exceeds ASTM A313