8020, 33450, 15, 30, and 40 Series 80/20 L Shaped Bracket Interior Inside Corner Connector with Set Screws for Aluminum Extrusion Profile, Inside to Inside (15). This 8020 hardware is made out of Zinc and works on any 1.5" x 1.5", 30mm x 30mm, or 40mm x 40mm t-slotted extruded aluminum bars.
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