LEGO PART 42003 Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes | Rebrickable - Build with LEGO
LEGO Black Cross Block 1 x 3 (42003 / 42796) | Brick Owl - LEGO Marketplace
Self Locking Bricks MOC Technical Parts Connectors 20pcs CROSS BLOCK 3M Building Block Pack for Kids Compatible with Lego 42003|Model Building Kits| - AliExpress