HEAVY DUTY- Constructed of sturdy steel for strength and durability. Non-slip, strong grip rubber surface at the top to ensure stability during workouts. Top surface measures 19.75” x 23.75”. ADJUSTABLE- 5 adjustable height positions to meet the needs of multiple users and increase the intensity of workouts over time. Height variations range from 18” to 31”. VERSATILE- Can be used for box jumps, step-ups, box squats, and many other muscle building and fat burning exercises. SECURE LOCKING MECHANISM- 2 popper-pins to adjust to preferred height. 2 steel rod safety pins on opposite legs of popper-pins lock each leg in place and ensure it will not move during use. ADDITIONAL- Meant for home and light-commercial gym use. Max weight load of 400 lb including the weight of the user. UPC 844192005876 ASIN B016OJ7LB6 Color Black Material Alloy Steel Brand Name Valor Fitness Item Weight 50 Pounds Part Number PBX-ADJ Manufacturer Valor Fitness Model Number PBX-ADJ Item Type Name Adjustable Plyo Box Maximum Height 31 Inches Number of Levels 5 Included Components One Adjustable Plyo Box Warranty Description 1 Year Weight Capacity Maximum 400 Pounds Global Trade Identification Number 00844192005876