ECSiNG 4X Letterbox Springs with Flex Arms 55x29x13x13.5mm 54x29x13x14.5mm for Traditional Letterbox Letterboards

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Product description

  • High-carbon steel wire with surface anti-rust treatment is not easy to deform after repeated opening and closing, and it can return to the position accurately even if there are many letters.
  • Mailbox spring with arm, including 2 sizes, convenient for replacement or whole set upgrade.

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