Amazon.com: 5PCS 3D Printer Accessories PC4-M6 Pneumatic Connector, Straight-through Pneumatic Joint Outer Diameter 4MM Pneumatic Joint Nylon Tube 3D Printer Parts : Industrial & Scientific
Nema17 stepper motor with 300mm lead screw 17HS4401 T8 Screw Lead 400mm 500mm 8mm 42 Motor 42BYGH With Screw for 3d Printer. - AliExpress Home Improvement
Generic Kuppler for CNC-Motorbackenwellenkupplung 2 mm bis 8mm Flexible Kupplung od 15x20mm 2/3 / 3,17/4/5/6 / 6,35/7/8 mm Rohr-Lxb (Inner Diameter : 2mm to 4mm) : Amazon.de: Gewerbe, Industrie & Wissenschaft
TANGJIANCHENG Kupplung 2 mm/2,3 mm/3 mm/3,17 mm/4 mm/5 mm/6 mm, Messing, flexible Wellenkupplung für Motorgetriebe-Stecker (Innendurchmesser: 3,17 mm, 5 mm) : Amazon.de: Baumarkt