j/fit Plyometric Jump Boxes - Singles in Heights of 12", 18", 24" and Sets up to 30" INDESTRUCTIBLE PLYO BOXES: Our plyo boxes are made from high quality materials so as to last for the many years to come. The heavy duty steel construction guarantees safe and dynamic performances. STABLE RUBBER STOPPERS: Excel your routines but keep your posture safe with our plyometric boxes. The rubber stoppers on the bottom are screwed for optimum safety and will keep boxes from sliding. CHOOSE SIZE PLYO BOX: 4 sizes plyo boxes that satisfy all needs.12" box-13x13" top, 14x14" base / 18" box-14x14" top, 18x18" base / 24" box-15x15" top, 21x21" base / 30" box-16x16" top, 23x23" base. NON SLIP TAPERED PLYOMETRIC PLATFORM: All of our j/fit jump platforms are tapered and ensure greater stability and ease in jumping. The stackable design saves space and time from storing. IMPROVE HEALTH & TONE BODY: Our portable plyo boxes are suitable for men and women who love total body workouts. Ideal for step ups, lateral step overs, jump squats, burpee box jumps and more.