These are Algues by Ronan and Erwan Bouroullec, made by Vitra (designed 2004). Each piece is a branching, seaweed-like plastic element with small round connectors at the tips. You clip them together to build a lattice, which can hang as a room divider, a curtain, or a wall decoration. You can make it as dense or open, and as large, as you like.
There are 25 pieces all in good condition, some are slightly bent.
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