... 20x20x3000mm, 25x25x3000mm or any other length [Usage] gyspum drywall suspension ceiling system. [Packing ] 50pcs bundle by steel strapping or plastic strapping ... , protective stop bead, power-strut channel, primary channel, rail, roof rafters, resilient channels,ribbed lath, strut channel,strut ... channel, studs, splayed corner angle, track, top cross rail, template network, T grid, T-grid,T bar,U ...