Carex Bed Support Rail Allows A Person To Get In And Out Of Bed Easily And Safely * Its Quick Convenient Tool Free And Easy To Assemble * Quick And Easy Assembly (no Tools Needed) * Support Adjustments Quick And Convenient Support Rail Adjustment * Fully Adjustable In Both Height And Depth This Under-bed Frame Adjusts From 34 To 45 * Fits Most Twin Queen And King Size Beds * Gap Betweeen Rails Is 20 * Retail Box Specifications: 21 W X 211/8 H X 6 D * 250 Lb. Weight Capacity.