Silicone tray inserts designed for the Iris AE Aluminum Case and the Aluminum Prototypes. Fits right into the bottom portion of the case to give support to the hotswap sockets on the Iris PCB, and allows you to push down on your rotary encoder without it pushing the PCB down. These inserts are already included with the aluminum case if you've purchased one after May 8, 2023, so these are for people who have purchased the cases in Round 1 or Round 2 (before May 8, 2023). Not for use with anything other than the aluminum case.