competitive price+high quality+quick delivery+best service Renton Spring Grade Titaniu Tensile Strength:200,000 psi(1.27 GPa) Density:.174 lbs/in3(4.82 g 3)Elastic Modulus:5,350,000 psi (36.9 GPa) Chrome Silicon SpringTensileStrength:250,000 psi(1.72 GPa) Density:.285 lbs/in3(7.90 g 3)Elastic Modulus:11,500,000 psi(79.3 GPa)