Check the listing for details. Comp Cams 750-16 10 Degree Hardened Steel Valve Spring Retainers Set. Condition: New. Listed at 80.95 USD. Engine Bearings Camshafts Valvetrain Parts GM LS / LT Parts Hemi Parts Wheels Tires Cold Air Kits Comp Cams 750-16 10 Degree Hardened Steel Valve Spring Retainers Set Outside Diameter of Outer Spring (in):1.250 in.Retainer Material:Steel Lock Style:10 degree Valve Spring Style:Standard Retainer Style:Standard Outside Diameter of Middle Spring (in):0.870 in. Inside Diameter of Inner Spring (in):0.735 in. Quantity:Sold as a set of 16. Notes:Will work with single or dual springs. Valve springs with larger diameters require retainers to handle the higher pressures developed by the springs. COMP Cams® Steel Retainers are the perfect solution to this problem. COMP® engineers used 3D CAD with FEA to design retainers with a modern and advanced contoured top profiling for lower stress, increased lift and a reduction in mass. The retainers are CNC-machined to exact tolerances using CAD/CAM software. All COMP® retainers use only high-grade SAE 4140 chromemoly steel with no lead,