For the Mi9 is this Hexagon 3D Flex Bumper.

Weighing in at 10g the new TPU bumper is primarily for the new Mi9, but will also fit the Mi7 and Mi8. It is designed to give a great fit for the popular Xtreme Twister/Speciale body’s, and also looks great too!

The bumper has a 10mm longer protrusion so gives a better fit for the modern method of forward mounted bodies. No more need for extra bumper foam!

The flexible design provides great impact resistance too.