Condition: New, High Quality Material: Metal + Plastic Type: Carburetor Carb Model: For Polaris Trail Boss 250 2x4 4x4 1987-1990 1992-1999 Inner Diameter: Approx.3.5cm / 1.37In Outer Diameter: Approx.4.2cm / 1.65In Fitment For: 1987-1999 Polaris Trail Boss 250 4X4 / 2x4 Please Note: 1. Please check part photos, part number (those two are critical), part description carefully to make sure it is what you need.