Metric Compression Spring, Color Silver, Music Wire, Overall Length 3-1/2 In., Outside Dia. 9/16 In., Wire Type Round, Wire Dia. 0.049 In., End Type Squared and Ground, Compressed Length 0.714 In., Spring Rate 5.8 lb./in., Meets/Exceeds DIN 17223, EN 10270-1, JIS G4314 SWP-A/B and AMS5112, Package Quantity 10