The transit base is a board with specially designed springs mounted on it that bolts to the bottom of your Engel and works like a shock absorber for the goods inside your fridge, so if you travel a lot of corrugated roads and have broken bottles or your eggs are cracked this accessory could help. When using the transit base you remove the feet from the bottom of the fridge and bolt the transit base with the springs and metal brackets towards the fridge. And don’t forget to tie your fridge down by the handles.