This is the Replacement 75cc Fuel Tank for the Nitro ST-15 from Tower Hobbies.
This mounts to the chassis with two screws and holds the fuel to run the truck.

FEATURES: Spring loaded primer button
Clear plastic construction
Red plactic spring-loaded flip-top cap

INCLUDES: One 75cc fuel tank (Key# 23)

REQUIRES: Standard fuel line, use GPMQ4131.
Two 3x10mm self tapping screws for mounting.

SPECS: Length: 61mm (2.4")
Width: 43mm (1.7")
Height: 69mm (2.7")(including cap and mounting posts)