t6slotT slot aluminum is a type of extruded aluminum profile that features a T-shaped slot running along its length. The T-slot desn allows for easy and flexible connection ofSections of MicroRax, MakerBeam, OpenBeam and V-Slot . As show above, these 4 type range from 10mm to 20mm square profile. Each profile has its unique features, but all share the T slot function.