√√ Warm prompt: A - Do not tighten the screws before the bed frame is completely assembled and ensure that the legs are in contact with the ground B - Mattress included C - Check whether all screws or bolts are tightened and regularly check √√ Best combination: ·This black metal frame bed and mattress is simple in design and practical. It is very suitable for teenagers rooms guest rooms dormitories apartments and friends ·The reliable design of the bed frame is completely made of durable steel with multiple contact points with the floor and plastic cover to protect your floor