This lightweight set (25 lbs.) of 4 jumps is handy for teaching your dog the sport of flyball. It comes with a nylon bag, making it easy to carry these jumps to various training locations. For dogs just learning flyball, the vinyl boards will "flex" if hit by the dog, rather than breaking! While these jumps are adjustable from 8" to 16" in 1" increments, we do not recommend these for use in actual flyball competitions, since the jump heights do not change instantly. Design protected by Patent No. 4,793,288. NOTE: Due to the size or weight of this item, our standard $5.95 shipping charge does not apply to this item. You must pay the exact shipping charges based on weight and shipping zone.