● Consists of a sofa bed and a rolling trundle for more sleeping space● Trundle with 4 lockable rubber casters for stable and safe fixation● Not only as a cozy daybed with trundle but also a comfy sofa as a whole● Medium carbon steel for perfect sturdiness and rust resistance● Headboard and footboard made of MDF for better durability● Applicable to living room kid's bedroom dormitory and more● Platform design requires no box spring● Suitable twin size of mattress is 39" x 75" (L x W)● The recommended thickness of mattress is lower than 8"● Easy-to-understand manual to help you finish the installationInstallation guide