Langstroth Beehive Frame - Medium Open is a 3d printable beehive frame compatible with common Langstroth. This size fits the honey super box. This frame is an open design that has groves to use with wax or plastic inserts that would go in the normal wood frames. It also has holes in the sides to allow for use of strings to guide formation of natural comb without insert if you wish. I also have other sizes and frame with the comb pattern integrated. Check my other posted models for those.