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height 67cm 6 columns height 67cm 8 columns height 67cm 10 column height 67cm 12 columns height 67cm 14 column height 67cm 16 columns height 67cm 18 column height 67cm 20 columns height 67cm 22 column height 67cm 24 columns height 67cm 26 column height 67cm 28 column height 67cm 30 column height 1 m 6 6 columns 1 m high 6 8 columns 1 m high 6 10 columns 1 m high 6 12 columns 1 m high 8 6 columns 1 m high 8 8 columns 1 m high 8 10 columns 1 m high 8 12 columns