This plastic, quart-size bottle lets you add the correct amount of 2-cycle (2-stroke) engine oil needed for the volume of gas in your gas can. Once you know the oil-to-gas ratio for your 2-cycle engine, simply fill your gas can (not included) with gas, then pour the oil into the Seachoice measuring container according to the amount of gas you pumped into the can, and finally, pour the oil from the Seachoice container into your gas can to mix. Gas volume marks on the container are in gallons and liters. Ideal for 100:1, 50:1, 40:1 and 24:1 ratios. Seachoice is committed to delivering quality marine accessories and OEM replacement parts to satisfy fishing, boating and watersports enthusiasts worldwide. Seachoice is run for and by boaters offering a wide-ranging product line while remaining affordable.