8020, 1010, 10 Series 1 Inch x 1 Inch T-Slotted Aluminum Extrusion DIY Extruded Linear Slot Bar Rail 80/20 (12" Long, Black Anodize): Amazon.com: Industrial & Scientific
Amazon.com: JCSPBYL 12pcs Silver 1010 Series Aluminum Profile Connectors, 12pcs 1" x 1" L Corner Bracket,with Sliding T Nuts and Bolts for 1010 Aluminum Extrusion Profiles : Industrial & Scientific
Amazon.com: 1010 1" x 1" Series Aluminum Profile Straight Line Connector, Extended Length Bracket Fastener with M5 Screw for Slot 6mm Aluminum Extrusion Profile Connect Parts : Industrial & Scientific
TSLOTS TS10-10 GR 1" x 1" Grooved .26" Aluminum Extrusion