Costway 3-in-1 Foam Plyometric Jump Box W/ Adjustable Height 30''/24''/20'' For Training : Target
Amazon.com : KHTO FITNESS Wood Plyometric Jump Box- 3-in-1 Wood Plyo Box for Exercise Training and Conditioning- Pre-drilled for Easy Assembling (16" x 14" x 12") : Sports & Outdoors