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A close up of two yellow cast urethane plastic structures with a spring functioning as a universal joint. The main construction material is cabernet souvingnon grapevines from Napa Valley California. The original yellow-joint positive was made from wood and cast in a silicone rubber mold. Notice all the steel wire cross braceing to pull the branches into compression. The structure is strong durable and lightweight. Photo Pirje Mykkanen.


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