BlueDot Trading Background-Stand-Black Studio Background Support Stand System Kit, Black Background (Black) Will support backgrounds / backdrops of muslin, kanvas, or paper just about any material. Supports backgrounds with crossbeam inserted into sleeve sewn into background material, or by clamping background to support stand (clamps not included). Two (2) included support stands are adjustable height between 30 and 7 Foot. Support stands have tripod bases with a stable 24 triangular footprint. Each support stand is topped with a bolt with threading. Crossbeam attaches tightly and securely to support stands with washers and wing nuts.