Monotrac VSP (Vertical Single Pour) insert trays are designed for single pour, cast in place set ups with solid locking dies. The VSP Full Arch Articulator only fits into the Medium Full Arch Base Mold. It does not fit into the Small or Large Full Arch Base Mold. Cast in place occlusion. Fast single pour set up. Solid, accurate die relocation 360 degree natural excursive flex. No pins. No glue. No model grinding.