Compression Spring Heavy Duty Color Dark Gray Music Wire Finish Plain Overall Length 3-1/2 in Outside Dia 23/32 in Wire Type Round Wire Dia 0.081 in End Type Squared and Ground Large Outside Dia 0.360 in Small Outside Dia 0.125 in Compressed Length 1.297 in Deflection @ Load 1.58 in Spring Rate 18 lb./in Meets/Exceeds ASTM A228 and AMS 5112 Package Quantity 10