Take your PowerStroke shocks to the next level with Pro-Line's Spring Assortment. Now you can adjust ride heights and dual-rate spring rates almost infanitly with these color coded springs. Kits come with six primary (short) and six secondary (long) high guality springs with color coded stripes to referance rates. Key Features Six Primary Springs (black/short) Six Secondary Springs (silver/long) Color coded stripes to identify rates