HomeCrate 5 to 6-inch White Bed Riser,Set of 4 Adds additional 5.25-inches of height to your bed Made of durable high impact resistant composite plastic polymer May be conveniently used on virtually any type of bed, includes 1-inch lip to keep bed post or caster securely in place the bed lifters is excelent for a platform bed Fits up to 2.63" bed posts