The RAM® Inserts for Zebra ET4x 10" without Rugged Frame - EZ-Roll'r™ Docks (RAP-INSERT-ZE21U) are custom molded inserts that fit into any RAM® EZ-Roll'r™ docks for the ET4x 10" series. These inserts ensure a snug, secure fit in the dock for the ET4x 10" tablets that do not have the OEM Rugged Frame or IntelliSkin® installed. Easily install by snapping each insert into place, following instructions available under the resources tab. Backed by a lifetime warranty.