This Standard Model is designed to operate correctly with any Classic 275-10 ohm fuel gauge. It easily adjusts to tank depths of 6" to 24" with the standard five-screw mounting pattern. It includes cork gasket, float assembly, mounting screws and instructions. Other Resistance Ranges are available as an option in the Standard Model configuration to match early or late GM, Ford, Toyota-Nissan, Stewart-Warner, Auto-Meter, and other aftermarket fuel gauges. It is designed to match tank sender openings with a minimum 1-1/2 inch center hole surrounded by a standard aftermarket 5-hole offset mounting bolt pattern.