Weatherproof steel, four slabs, two: 58 1/2 × 58 1/2″ × 9 1/2″ (148.6 × 148.6 × 24.1 cm), two: 58 1/2″ × 16′ 4 1/8″ × 9 1/2″ (148.6 cm × 5 m × 24.1 cm). Museo Nacional Centro de Arte Reina Sofia, Madrid

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