Boeray 50pcs M3 Slide in T Nut Drop in Nut for 2020 Sereis Aluminum Extrusion Profile Slot 6mm Total Size : 10 x 10 x 5mm/0.4" x 0.4" x 0.2"(L*W*T) Package included quantity : 50pcs Used for : Aluminum Extrusion with Profile 20x20mm,They will slide in from the side Thread Diameter : M3 Metric Package Weight : 80g