Technic Connector - LEGO® Technic Axle Connector 2x3 with Ball Joint Socket - The shop Briques Passion
LEGO Plate 1x2 with Tow Ball Socket LIGHT GRAY (100 pcs) | BRICKshop - LEGO en DUPLO specialist
Technic Connector - LEGO® Technic Axle Connector 2x3 with Ball Joint Socket - The shop Briques Passion
LEGO Part x1192px3 Technic, Axle Connector 2 x 3 with Ball Socket and Axle Socket with Black Rubber Insert [Dark Bluish Gray] (4223771) | iBricktoys: LEGO shop guide and database
Let's Play Lego Sockets - Yanko Design
Twin-socket for a Lego Ball-Joint (My Own Design - 4K) - YouTube