Usage Tips:Features: 1.For Fuel Sending: This fuel sending unit can better monitor the fuel level and ensure stable fuel flowing, thus facilitating stable power. 2.Practical Using: Widely applied to ships, cars, trucks, etc., ideal for oil level gauge, water level gauge and any liquid without impurities. 3.Higher Accuracy: The output signal is EU standard 0?190 ohms, and the resolution accuracy is 10mm, and the sending unit has alarm switch. 4.Stainless Steel: Consisting of 316 stainless steel main body, PVC cable and NBR float, the 5in fuel sending unit is very durable for using. 5.Easy to Install: Comes with a compact size and a light weight, the convenient installation can be quickly completed within 15 minutes. Specification: Item Type: Boat Fuel Sending Unit Body Material: 316 Stainless Steel Cable Material: PVC Float: NBR Installation Method: Standard SAE 5 hole type. Screw Size: M5 x 0.8 Aperture: Approx. 5mm/0.20in Product Specification: Approx. 125mm / 5in Recommended Water Tank Size: Approx. 135 ~ 150mm / 5.31 ~ 5.91in Output Signal: EU standard 0-190 ohms. 0 ohms at no load, 190 ohms at full load. Resolution Range: Approx. 10mm / 0.39in Fuel and Water Level Sensor Type: Resistance Rated Current of Alarm Switch: 500mA Protection Grade: IP67 Operating Temperature: -40 ~ +185, that is -40 ~ +85. Application: For ships, yachts, trucks, RV. PackageList: 1 x Fuel Level Sensor 5 x Screw 1 x Washer