Amazon.com: AFUNTA 5 Pcs Flexible Couplings 5mm to 8mm Compatible with NEMA 17 Stepper Motors, Used in Small CNC Machines & 3D Printer Prusa i3 or ORD Bot with 2 Pcs Allen
Amazon.com: 3030 Series/T Shape Heavy Duty Aluminum Profile Connector Bracket Set,4Pcs T Shape Connector and 16pcs 3030 T-Slot Nuts,16pcs M6x16mm Hex Socket Cap Screw,for 3030 Series Aluminum Profile. : Industrial & Scientific