Sets that have x550b: Electric Train Motor 12V 4 x 12 x 3 1/3 - Type II
LEGO Part 4212b Vehicle, Base 4 x 10 x 2/3 with 2 x 2 Recessed Center with Smooth Underside, No Center Hole (Black) | iBricktoys: LEGO shop guide and database
LEGO Black Car Base 10 x 4 x 2/3 with 4 x 2 Centre Well (30029) | Brick Owl - LEGO Marketplace
LEGO® Parts - Car - Baseplate - ToyPro.com
Easy Lego Phone Stand : 9 Steps - Instructables
LEGO REVIEW: Star Wars Vader's TIE Advanced vs. A-Wing Starfighter #75150 - LEGO Reviews - BRICKPICKER
Lego Podvozek základní 4 × 10 × 2/3 s 4 × 2 zapuštěný střed černá | Hrabárna Lega - kostičky, sestavy, bezkonkurenční ceny.
LEGO® 47404 4209085 - 6039204
LEGO Black Car Base 4 x 12 x 0.667 | Brick Owl - LEGO Marketplace
BrickLink - Part 30029 : LEGO Vehicle, Base 4 x 10 x 2/3 with 4 x 2 Recessed Center with Smooth Underside [Vehicle, Base] - BrickLink Reference Catalog