Amazon.com: LEGO TECHNIC 100 pcs BLACK AXLE SIZE 4 STUDS STUD LENGTH Cross Rod Short Mindstorms robot motor part piece 3705 NXT ev3 robotics : Toys & Games
LEGO Technic Axles - 12L
5.5L stud Metal Axle X Bar Shaft Rods with STOP compatible with Lego T – Metal Technic Parts
LEGO Axle 8 (3707) | Brick Owl - LEGO Marketplace
Amazon.com: LEGO TECHNIC 100 pcs BLACK AXLE SIZE 4 STUDS STUD LENGTH Cross Rod Short Mindstorms robot motor part piece 3705 NXT ev3 robotics : Toys & Games
LEGO Technic Axles - Choose Length & Colour (Packs of 4) Design 4519, 3706, etc. | eBay