This is Sullivan's 10oz Slant Type Fuel Tank.
Molded from rigid high density polyethylene. This tank kit includes the hardware needed for glow fuel operation, including twist-tie clamps and both brass and nylon tubing. With the Gasoline Conversion Kit this fuel tank may be used with gasoline or diesel fuel.
Size : 10 oz (300 ml)
Height : 2-1/8 in. (54 mm)
Width : 2-1/2 in. (64 mm)
Length : 4-3/8 in. (111 mm)