Why is V-slot so much more expensive than T-slot

Why is V-slot so much more expensive than T-slot v slot aluminum extrusion V-Slot Linear Rail aluminum extrusion profile is the ultimate solution combining both linear motion and a modular, structural framing system victory slot png Slot Covers Size 6: 3Ikesyj Slot Covers Size 8: 3InACzK

victory slot png V-Slot is a high-quality extruded aluminum profile building block that has an extremely smooth linear v groove rail on all 4 sides It's precise, easy to use

voodoo magic slot Is it possible to get a custom cut of the Aluminium Extrusion and V-slot Rails of 10 feet, instead of the standard 2000mm offered? Basically I've single 2020 aluminium extrusion I want to make a mount where I will mount my Craft blade Now I want craft blade to slide