2PCS 5mm to 6mm Aluminium Plum Flexible Shaft Coupling 25mm Length 20mm Diameter Connector Flexible Coupler for 3D Printer CNC Machine and Servo Stepped Motor: Amazon.com: Industrial & Scientific
Amazon.com: Efco 1 x 5mm x 2m Aluminium Anodised Flat Wire, Silver
Amazon.com: uxcell 6063 Aluminum Tube, 4mm 5mm 6mm OD x 1mm Wall Thickness 300mm Length Seamless Round Pipe Tubing, Pack of 3 : Industrial & Scientific
10 Pieces Hollow Metal Cavity Fixing Hollow Door Anchor for 0-5mm Door Extra Short Hollow Wall Anchors Aluminium cladding Sheet Steel Pipe, Iron Sheet, Hollow Plastic Sheet (8 * 16MM): Amazon.com: Industrial
Amazon.com: CRAFTMEMORE 100pack 3/16" ID Colored Eyelets Grommets with Washers 5mm Aluminium Eyelet for DIY Craft, Shoes, Bead Cores, Clothes, Leather, Canvas (White) : Arts, Crafts & Sewing
Amazon.com: Turntable Round Dining Table Aluminium Alloy Rotating Bearing Swivel Plate for Table Sculpture(25cmH8.5MM): Home & Kitchen