8" Filler Cap Assembly - Unlike many molders, we manufacture all our polyethylene Dura-LIFE® fittings to ensure the same high quality provided in our Dura-LIFE® tanks and drums. Our Dura-LIFE® fittings are made from the same field of material to ensure the same chemical resistance as our tanks and drums. If you can't find what you need, give us a call. We offer custom fittings and accessories to meet your specific application. We also offer replacement components for our metal stands and skids upon request.