Polaris 400 Four Wheeler (2 Stroke) Carb Needle Seat Float Valve/Repairs Carburetor 3131385 & 3130495 Assembled where Carburetor 3130495 & 3131385 is used. Built to Polaris OEM Standards. Dimensions: Threads 9.8mm Nut 9mm See "Product Description" for what machine it fits. Free USPS domestic shipping