Explore Scientific Shroud for 16 in. Truss Tube DOB DOB16SHR. Helps block out extraneous exterior and reflected interior light for higher contrast views and image captures. Constructed of a lightweight and breathable Lycra/Spandex black fabric with elastic ends to help hold the shroud tight around the truss tubes. Package Contents: Explore Scientific Shroud for 16 in. Dobsonian Truss Tube Explore Scientific DOB16SHR: Shroud for 16 in. Truss Tube DOB