NOS Crower 87064 426 Hemi Jumbo Chromoly Retainers for 1.500-1.550 O.D. Spring 10 Degree. Sale for set of 16. For dual springs with Flat Tappet Lifters in 426 Hemi. Chromoly Retainers for 1.500-1.550 O.D. Spring 10 Degree.We are not a manufacturer of this item.