ChromLives Microphone Cover Microphone Windscreen Foam Cover Black Top Grade 6 Pack (Diameter 1/8IN-5P) This Expan Background Drive Set inserts into 3 paper/muslin/cloth background rolls. The chain assists in raising and lowering the background. Comes complete with 3 plastic drive chains(color may varied). They can be fixed on Background Stand, Autopole, Wall or Ceiling It is very easy working with full length background paper/muslin/cloth. The expans fit into each end of the tubes, then fit firmly onto the hooks. Using the Expans on triple hooks will enable you to hang three rolls of paper/muslin/cloth Fabric cores or Metal/PVC tubing are NOT included