LEGO PART 25214 Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end | Rebrickable - Build with LEGO
BrickLink - Part 71075 : LEGO Brick, Round 1 x 1 d. 90 Degree Elbow Macaroni - No Stud - Type 1 [Brick, Round] - BrickLink Reference Catalog
BuildMOC Assembles Particles 71076 TUBE CURVED 1 2/3, METALIZED Building Blocks Parts DIY Electric Education Children Gifts|Blocks| - AliExpress