b'SET OF 3 PLATFORMS D134SHORT OPTICAL PLATFORMMEDIUM OPTICAL PLATFORMLARGE OPTICAL PLATFORM 6 3 / 4 W x 6 3 / 4 D x 1H 6 3 / 4 W x 6 3 / 4 D x 2H 6 3 / 4 W x 6 3 / 4 D x 3HD131 D132 D133SET OF 3 TOWERS D138FRAME TOWER - 1 PIECEFRAME TOWER - 2 PIECEFRAME TOWER - 3 PIECE 6 1 / 4 W x 5D x 3 7 / 16 H 6 1 / 4 W x 5D x 5 5 / 16 H 6 1 / 4 W x 5D x 9 9 / 16 HD135 D136 D137SET OF 3 RISERS D142ALUMINUM RISER - 1 PIECE ALUMINUM RISER - 2 PIECE ALUMINUM RISER - 3 PIECE7W x 4D x 4 1 / 8 H 7W x 4D x 6 1 / 2 H 7W x 4D x 8 7 / 8 HD139 D140 D141FRAME RISERS | 321'