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Amazon.com: Gobricks GDS-936 Connector Perpendicular 3L with 2Pin Holes Compatible with Lego 42003 All Major Brick Brands Toys Building Blocks Technical Parts Assembles DIY (30 PCS,26 Black(080))
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Self-Locking Bricks MOC Technical Parts Connectors 20pcs CROSS BLOCK 3M Building Block Pack for Kids Compatible with Lego 42003 - AliExpress
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