Its new to me: stiffening the joints with Element 74261/6106472 (Element Exposition) | The Rambling Brick
Lego Technic 1x Steering Ball Joint Large Ball Padded Swivel Axle 92910 New | eBay
Building Blocks Bulk Technical Parts 2pcs POWER JOINT & 2pcs POWER JOINT BALLPART compatible with lego for kids boys toy|Model Building Kits| - AliExpress
Ballshaft! | New Elementary: LEGO® parts, sets and techniques
LEGO part 32474 - Blue Technic Ball Joint at BrickScout
Lego Technic Axle and Pin Connector 47296 with Two Ball Joint Sockets | eBay
LEGO Sets with Part 57909 Brick 2 x 2 with Ball Joint and Axlehole, Technic Modified Axle Hole
BrickLink - Part 32174 : LEGO Technic, Axle Connector 2 x 3 with Ball Joint Socket - Open Sides, Angled Forks with Closed Axle Holes [Technic, Connector] - BrickLink Reference Catalog
Technic Ball Joint
LEGO Part 32173 Technic Ball Joint 2 x 7 with 2 Ball Joints [Dark Gray] (4120150, 4199475, 4289780) | iBricktoys: LEGO shop guide and database
LEGO PART 32474 Technic Ball Joint | Rebrickable - Build with LEGO