T9a Piano Wire High Strength Wire Extra Hard Spring Straight Steel Wire 0.3mm 0.4mm 0.5mm - Springs - AliExpress
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Stainless Steel Spring Wire, T9A Piano Wire High Strength Wire Extra Hard Spring Straight Steel Wire 0.3mm 0.4mm 0.5mm (Size : 0.4mmx1m(3pcs)) : Amazon.co.uk: Business, Industry & Science