Muslin Studio Photo Background Material: cotton Muslin Studio Photo Background Background stand size : 2M , 2.2M , 2.4M , 2.6M , 2.8M Background stand material : Aluminium , more light .Background stand has four sections , screw type to tight section .Three diameter :25/21/19/16MM ; 30/25/21/19MM ; 35/30/25/21MM Muslin Studio Photo Background