This is a parametric enclosure for the PanelDue controller board and touch-screen display. It supports two different 4.3 inch displays, two 5 inch displays, and one 7 inch display. The lip is optional and is intended for hanging the enclosure from the front top horizontal extrusion of a Kossel. Please note: PanelDue boards shipped from January 2016 onwards are version 1.1 which is 5mm narrower than the version 1.0. The OpenScad model allows you to select which size you want.It should be possible to open this file in Customizer to select the options you require, but there appears to be a bug in Customizer because the options don't appear.