8 inch stackable bed risers; this 4 pack bed risers comes with 4 x 5 inch & 4 x 3 inch, that means you can freely choose different lifting heights 3 / 5 / 8 inches according to your needs Sturdy durable bed risers; These bed risers are made of ABS plastic, can easily support up to 6000 lbs, it won't crack or break during use; Trapezoidal construction for added stability and to avoid tipping Security bed risers;; The bed lifters with the anti-slip bottom make them very stable and will not easy fall down. You will no need worry about the safety issue when you use the bed risers. Space utilization; The bed risers will raise your bed or furniture frame, which will provide more space to organize products or make your hidden space easier to clean Widely application; Bed Lifters or Casters fit securely into the recess cup built into the top of the Bed Risers; This bed risers are suitable for beds, sofas, cabinets, tables 8-inch stackable bed risers; these 4-pack bed risers come with 4 x 5 inch & 4 x 3 inch, which means you can freely choose different lifting heights 3 / 5 / 8 inches according to your needs