Seadog - Stainless Heavy Duty Hatch Spring 11-5/8"This strong Hatch Spring has an internal cable that prevents the spring from being overextended during normal use. This 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). Part # A B C