Compression Spring Heavy Duty Color Dark Gray Music Wire Finish Plain Overall Length 1-1/4 in Outside Dia 27/64 in Wire Type Round Wire Dia 0.055 in End Type Squared and Ground Large Outside Dia 0.360 in Small Outside Dia 0.125 in Compressed Length 0.553 in Deflection @ Load 0.51 in Spring Rate 35 lb./in Meets/Exceeds ASTM A228 and AMS 5112 Package Quantity 10