Filter Fit For ATV Quad Go Kart Pit Dirt Mini Bikes 42mm Waterproof Engine Replacement Parts vehicle Fit For atv quad go kart pit dirt mini bike carb port, standard 42mm connection diameter Core safe material, black waterproof rubber outer cover; multi layer internal filter cotton, blocks dust splashing water Smooth control stable feedback, balanced passing density, supplies steady airflow to sustain consistent engine power output Simple installation easy , flexible clamp fixing structure, quick for filter cotton washing replacement Reliable craft standard dimension, uniform wall thickness; accurate inner 42mm bore size, fits carburetor outline