This is a Manfrotto 1004BAC-3 Master Light Stand Pack of Three. Each stand in this set is a 4 section, 3 riser aluminum light stand with a black anodized finish that extends to a maximum height of 12' (4 m).
Each stand features QSS -- Quick Stack System, which allows the 3 stands to be stacked and bolted together when they are closed for storage or transport.