BrickLink - Part 32140pb14 : LEGO Technic, Liftarm, Modified Bent Thick L-Shape 2 x 4 with Dark Bluish Gray Door Handle Pattern (Sticker) - Set 42078 [Technic, Liftarm, Decorated] - BrickLink Reference Catalog
LEGO PART 32523 Technic Beam 1 x 3 Thick | Rebrickable - Build with LEGO
Brick-Shop - LEGO Technic 4142822 black liftarm brick 1x3 white (32523) Electric Battery Box Train Power Functions Motor (8881) Engine Motor Lego (7897)