1.stainless steel frame 2.the side rails's height is adjustable 3.with mattress 4. castors with lock baby bed children's bed :1. stainless steel bed frame ,and side rails ,2. the front side rail is adjustable .can be up and down .3.mattress made of high density sponge,waterproof cloth ,easily to clean .4.cators ,2 of them with brakes, to keep stable .