A pair of recessed Rack Ears for Behringer Digital Mixers XR16 XR18 SD18 Midas MR16 MR18.   Helps offset the mixer back into the rack so you can leave XLR's plugged in during transport without crunching your xlr cables.   Also has a large hole to allow cable passthrough.   I've used these on my personal mixer for over a year and they worked great!      Printed to be very rigid with strong material.   Made a few modifications, added a little larger hole for cords, with a round over on the backside.  The front side now has a textured finish.