Works on any Helmets / Size: 12.1 inch*Length (Helmet not Included, we do not sell helmet) Very good adhesion and stability,hold up to 200 mph Silicone material,Safe and environmentally friendly, please feel free to use Customised cut and stick with different colors HHongJM Mohawk for Helmet Wigs Hair Helmet Mohawk Decoration Hawk for Motorcycle Bicycle Snowboarding Skiing Biking Cycling Helmets Rainbow Color (Helmet Not Included)