Pegboard hook for the 150x100, 100x70 and 70x50 Stackable box by @3Dservis. Fits standard US 1" spacing pegboard.

This is Version 3 (V1 and 2 are here). V3 is a complete redesign that provides much more lateral stability and is less prone to being accidentally dislodged. The new design also allowed me to support to 100x70 size as well as the 150x100.   

Update: added one for the 70x50 box

This version requires minimal support (it will print without but the bridge on the back may look messy)