DOP5041HBSP Briggs and Stratton Fuel Stabilizer No. 5041H.
This is true OEM Briggs and Stratton Fuel Stabilizer. 4.2 oz (125 ml) bottle. Used to stabilize fuel in all small engines, 2 or 4 cycle. Treats up to 10 gallons of fuel. Keeps fuel fresh for up to 24 months. Helps reduce varnish build up.