The DT1 Air Filter 50mm for PE28 is a high-quality filter designed for Pit Bikes. It features a dual-layer foam that is long-lasting and held together with strong glue, ensuring optimal performance. Unlike other filters, it has no spring that could cause tears. With its 50mm opening, it is suitable for both PE28 and Nibbi carbs. The filter's domed shape also prevents contact with the frame and exhaust, making it a smart choice for any bike enthusiast.