diff --git a/vitamins/corner_3d_connectors.scad b/vitamins/corner_3d_connectors.scad
new file mode 100644
index 0000000..8995301
--- /dev/null
+++ b/vitamins/corner_3d_connectors.scad
@@ -0,0 +1,27 @@
+//
+// NopSCADlib Copyright Chris Palmer 2021
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see .
+//
+
+// sdia nd nt nnt nsx nty1 nty2
+corner_3d_connector_2020 = ["corner_3d_connector_2020", 20, 5, 13, 2.5, 4, 6, 3.5,5, 15.5,10, 6, [0.5], [0.5]];
+corner_3d_connector_3030 = ["corner_3d_connector_3030", 29.6,6.2, 22, 2.5, 6, 8, 4.2,6.2,24.9,16, 11, [0.25,0.75], [0.65]];
+corner_3d_connector_4040 = ["corner_3d_connector_4040", 40,9.5, 25, 2.5, 6, 8, 5, 9.5,34.0,19.5, 14, [0.25,0.75], [0.65]];
+
+corner_3d_connectors = [corner_3d_connector_2020,corner_3d_connector_3030,corner_3d_connector_4040];
+
+use
\ No newline at end of file