2PCS 5mm to 8mm Aluminium Plum Flexible Shaft Coupling D20 L25 Connector Flexible Coupler for 3D Printer/DIY Encoder and Servo Stepped Motor: Amazon.com: Industrial & Scientific
Amazon.com : Kbrotech Bicycle Headset Spacer Aluminium Alloy Bike Stem Headset Spacers Fork Washer Fit for 1 1/8-Inch Stem 2mm 5mm 10mm (8pieces) (Aluminum Alloy) : Sports & Outdoors
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: Efco 5 mm x 2 m Approx 38 g Aluminium Wire
Amazon.com: CRAFTMEMORE 100pack 3/16" ID Colored Eyelets Grommets with Washers 5mm Aluminium Eyelet for DIY Craft, Shoes, Bead Cores, Clothes, Leather, Canvas (Black) : Arts, Crafts & Sewing
Amazon.com: 100pcs 9mm x 9mm x 5mm Mini Aluminium Heat Sink Heatsink Fin for PC IC LED Chipset Mainboard RAM Cooling (Blue) : Electronics
uxcell 197mil 11.1sqft Car Cell Foam 5mm Sound Proofing Insulation Deadener Mat High Density Foam Aluminium Foil Heat Sound Deadening Mat 40.6x39.4inch