The Rail Rap measures: 6″ long and 2.5″ wide. Diameter Fitting: 1.5″ to 2.0″ There are many features users have found to be very useful: Cable management Hand positioning reference point Soft point of contact for your rail on a hard surface Reduces heat mirage to keep your optics' visibility clear Eliminates the need for gloves which rip or get lost often DuPont Kevlar TEX-80 thread DuPont Kevlar Bungee cord rated to 800 F