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Smart Wire .004" X 1MT is backordered and will ship as soon as it is back in stock.
Smart wire' is a shape memory alloy (SMA) that changes its length with a useful pulling force when a small current is passed through it. (Minimum order = 1 metre. This is enough for 10 useable lengths). 
We're expanding Bunsen to allow comparison of non-science products, too! Preview the new site here (beta)
