This is Sullivan's 10oz Flextank Rectangular Type Fuel Tank.

FEATURES: Molded from a special flexible, translucent polymer making it easier
            to fit into tight places.
          Very durable!
          Seamless tank body.
          This tank kit includes the hardware needed for glow fuel operation,
            including twist-tie clamps and both brass and nylon tubing.
          Flextanks are for glow fuel only! They cannot be converted for use
            with gasoline or diesel fuel.
          Tank body has a lifetime warranty.

INCLUDES: One Flextank Rectangular Fuel Tank Kit

REQUIRES: Hobby Knife
          Phillips Screwdriver

SPECS:    Size:   10oz    (300ml)
          Height: 2-1/2"  (64mm)
          Width:  2-1/8"  (54mm)
          Length: 4-3/8"  (111mm)
                                                             Update J2M 1/13/92
                                                                        2/25/97
                                                                       kr6/5/02
                                                                          ir/kh