Compression Spring Heavy Duty Color Dark Gray Music Wire Finish Plain Overall Length 4 in Outside Dia 1-15/32 in Wire Type Round Wire Dia 0.148 in End Type Squared and Ground Large Outside Dia 0.360 in Small Outside Dia 0.125 in Compressed Length 1.593 in Deflection @ Load 1.54 in Spring Rate 37 lb./in Meets/Exceeds ASTM A228 and AMS 5112 Package Quantity 10