Bones Ceramic Super REDS® are lighter and provide faster acceleration because the balls weigh much less. They create less friction and are thus faster than Super REDS, with or without lubricant! When you get dirt into your Ceramic Super REDS, the ceramic balls will help to re-polish the steel races flat again, providing a self-healing benefit because ceramic balls are so much harder than steel. Finally, ceramic balls will not rust, further lengthening their life. Ceramic Super REDS use a bone-colored shield with laser-engraved outer races for identification.