8020: How and When To Use a T-Slot Stud

It can sometmes be confusing because, for example, the 40 x 40 extrusions on Ender 3 and similar printers are actually 20 series, not 40 series

20 Series Extruded Aluminium T slot profile · Cutting service · Drilling and tapping service · Profile 20×20 – 6mm Anodised mat black · Profile 20×20

2021 slot 1 quant View mk's variety of 25 series t-slot aluminum extrusions

2022 slot 1 varc 20 Series Aluminium Profiles Finish: Anodized Silver Matt, Available Sizes: 1) Sec No 300, T Slot Aluminium Profile 20x20, Standard Length 3 & 6 mtr,