15" Spike Down Bases w/12" Spikes (3) Designed specifically for leagues and facilities that do not have a mounting system in place. Made in the USA a designed to release upon impact. With the unique spike down feature, installation and removal are a breeze. The product is ideal for practice or play in any grassy area. Includes: x3 15” Spike Down bases covers, x3 Spike Down mounting tees, x9 spikes - 3 for each tee. Base dimensions: 15 x 15 x 2.5