On the right is the PRESTO steaming basket, which allows you to cook various foods without the flavors mixing. Steam will not intermix the flavors like boiling water in contact with the food. On the lower left is the stainless steel wire rack to support the basket in the pressure cooker, and above it is the standard aluminum rack which came with my stainless pressure cooker. I wish they made that out of stainless steel as well, but the one in the box is definitely aluminum.