The set includes four black matte Rims edge protectors that are specifically designed to cover performance R21 wheels and protect edge of the rims from damage. 
Please note that these hubcaps are only compatible with the OEM R21Performance alloy wheels.
This hubcaps cover whole the rim and make a great protection of the alloy wheels. 
Additionally, foam inside the rim is included with the wheel covers to ensure a perfect fit on your Tesla Model Y