Manton Pushrods D-304-6.4 - Series 3 6.4 Power Stroke Diesel Pushrods Series 3 semi to high performance: 3/8 diameter by .095 wall thickness Hard drawn 4130/4135 seamless chromoly tubing - approximately 170,000 psi tensile strength Rated for use in applications up to 800 Horse Power Billet tips made from high impant , wear resistance 8620 bar stock is then Case hardened , heat treated and tempedered Stock length