Specification: - Dimensions of each rail: 59"/71"/79" L x 27"H - 8 placements to adjust height - Material: all steel frame + soft material wrapping protection - Suitable For: kid bed,solid wood bed, kid bed, built-in bed, flatbed, thick mattresses bed, and other large-size beds Attention: - If you want to connect to the three walls in the picture, you need to buy 3 side rails depending on the size of the mattress. - Manual measurement, please allow 1-2 inch error. - Suitable For: kid bed,solid wood bed, kid bed, built-in bed, flatbed, thick mattresses bed, and other large-size beds Safety Information: 1.SUFFOCATION AND STRANGULATION HAZARD Gaps in and around bed rails have entrapped young children and killed infants. 2.NEVER use with children younger than 2 years old. Use ONLY with older children who can get in and out of adult bed without help.NEVER use in place of crib. 3.NEVER use unless bed rail is tight against mattress, without gaps, and at least 9 in. from headboard and footboard. Do not fill gaps with pillows, blankets, or other items that can suffocate children. 4.NEVER use on toddler bed, bunk bed, water bed. or bed with inflatable mattress. 5.When the baby is inside, pull the upper bar to the top and keep it locked to prevent the baby from climbing out or colliding. 6.It must to be used in the case of adult care.