Compression Spring Heavy Duty Color Dark Gray Music Wire Finish Plain Overall Length 5/16 in Outside Dia 7/32 in Wire Type Round Wire Dia 0.018 in End Type Squared and Ground Large Outside Dia 0.360 in Small Outside Dia 0.125 in Compressed Length 0.099 in Deflection @ Load 0.17 in Spring Rate 9 lb./in Meets/Exceeds ASTM-A228 AMS 5112 Package Quantity 10