Stainless Steel/Nylon Hatch SpringThis strong Hatch Spring has an internal cable that prevents the spring from being overextended during normal use. Ideal for larger hatches and dock boxes. Constructed of corrosion resistant formed 304 stainless steel with heavy duty molded nylon mounting pads on both ends. Installs with eight #10 RH fasteners (not included). WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.