Die Spring Extra Heavy Duty Color Red Oil Tempered Chrome Silicone Finish Plain Overall Length 3-1/8 in Outside Dia 2-3/8 in Wire Dia N/A End Type Closed and Ground Large Outside Dia 0.360 in Small Outside Dia 0.125 in Compressed Length N/A Deflection @ Load 0.15 Spring Rate 1 lb./in Meets/Exceeds ASTM A313 AMS 5688