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BrickLink - Part 42003 : LEGO Technic, Axle and Pin Connector Perpendicular 3L with 2 Pin Holes [Technic, Connector] - BrickLink Reference Catalog
LEGO® 42003 4211779 - 6273724 - ToyPro
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LEGO Black Cross Block 1 x 3 (42003 / 42796) | Brick Owl - LEGO Marketplace
BrickLink - Part 42003 : LEGO Technic, Axle and Pin Connector Perpendicular 3L with 2 Pin Holes [Technic, Connector] - BrickLink Reference Catalog