How to install the rail: 1.Connect the upper and lower connecting tube. 2.Install the upper and lower connecting tube into the fence net cover. 3.Install the two sides of the upper and lower connecting tube into the slots of the lifting rod. 4.Use special screws to lock the left and right lift rob and the base. 5.Pull the fence net cover zipper together. TIPS:If you receive the goods without instructions or you have a problem with the installation, please don’t worry, contact us immediately, we will help you in time. 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.