Amazon.com: uxcell 4mm to 4mm Bore Rigid Coupling Set Screw L25XD14 Aluminum Alloy,Shaft Coupler Connector for 3D Printers, Motor Accessories,Blue,2pcs : Industrial & Scientific
Amazon.com: ULTIMATE RACING 4mm Aluminum Nylock Nut (Red) (10pcs) : Toys & Games
Amazon.com: 4mm x 200mm x 200mm 6061 Aluminum Plate Sheet : Industrial & Scientific
Amazon.com: Mdoker 13.8 Inch Aluminum Knitting Needles,Colored Straight Single Pointed Metal Sweater Knitting Needle for DIY Knitting Projects,Size US 6(4mm)
Amazon.com: PATIKIL M4 Aluminum Spacer, 10 Pack 4.2mm ID x 10mm OD x 4mm L Metal Spacer Aluminum Round Plain Finish Spacer Screw Standoff for 3/16" or M4 Screw Bolts : Industrial
Amazon.com: METALLIXITY 6063 Aluminum Tube (8mm OD x 4mm ID x 300mm L), Aluminum Round Tubing - for Home Furnishing, Machinery, DIY Handicraft : Industrial & Scientific
Amazon.com: 4mm x 200mm x 200mm 7075 T651 Aluminum Sheet Metal Plate : Industrial & Scientific
Amazon.com: Aluminum Sheets Metal, Aluminum Metal Plate Covered with Protective Film for Crafting, DIY, Handcraft, 100/150/200/300mm, 0.8/1/1.5/2/3/4mm Thick,0.8 * 100 * 100mm : Industrial & Scientific