There are two models: Storm plastic guard with 7/8th (22.2mm) single point universal mounting brackets or Storm plastic guard designed for end-of-bar mounting for all hollow end steel handlebars of 7/8" or 1" cruiser style diameter.
Designed specifically for street bikes and mounted to a single point on the handlebars or at the bar ends. Provides great wind and cold weather protection but minimal crash protection as there is no aluminium backbone.