13 8020 T-Slot ideas

What is 8020? 80_20 t slot 1010-72 from 8020 Inc at RS 80 20 aluminum t slot 8020 Framing Extrusion: 10 Series, 8 ft Nominal Lg, Silver, Double, 6 T-Slotted Extrusion,10S,97 Lx1 $ pkg $ ea Item: 924233-7 Pkg Qty

80_20 t slot 2 Pack 8020 T-Slot Extrusion Aluminum 4 Slot 30 916” Length ” W ” Thick Tucker Industries Surplus ; % positive feedback