The SKYWALKER Trampoline 5.5" Spring PN# PK3010 - Qty 12 is a set of 12 trampoline springs designed for outdoor use. Made by the trusted brand Skywalker, these springs are compatible with trampolines that have a 12-foot mat size. The 5.5" spring length provides a safe and durable option for bouncing fun. Ideal for adding bounce to your trampoline, these springs are sure to enhance your outdoor play experience.