2" Stretched one piece tanks. No weld-on stretched sections, just one piece high quality steel. Indents on both sides of these tanks add a touch of class. Please note that the seat cutout at the stretched sections matches most narrow model seats, e.g. Silhouette. Available for use with OEM style screw-in gas cap or complete with Quick Cam Aero Style or pop-up gas cap. Must be used in combination with a 13/16" (22mm) petcock. Tanks hold approx. 4 gallon (15,1L.) and come complete with hardware.