Rocker Arm Mounting Style Stud Rocker Arm Ratio 1.52 Rocker Arm Style Roller tip Stud Size 3/8 in. Shims Included No Rocker Arm Material Steel Self-Aligning No Rocker Arm Body Style Standard Rocker Arm Nut Style Self-locking Slot Style Long Maximum Spring Diameter (in) 1.500 in. Rocker Arm Finish Natural Quantity Sold as a set of 16.