Attachments for Momo Fighter Classic and Momo Fighter Evo helmets with ECE2205 certification. They are not compatible with the new Momo ECE2206 version. To understand compatibility, these attachments fit helmets that have the external metal screw mechanism (to remove the visor you need to unscrew the attachment). If instead it's the new ECE2206 version where the external attachment is removed with a small click, it is not compatible.