This fuel tank gauge indicates the amount of fuel remaining in propane tanks used with various appliances. It features an easy-to-read digital LED display and is compatible with any non-refillable fuel cylinder with a CGA600 connection, including 14 oz and 16 oz Propane fuel and MAP-Pro fuel. The price drops from $11.99 to $7.97. Shipping is free for Prime members or on orders over $35.