The McCormick 3537542M1 Filler Cap is a genuine OEM replacement part designed for various McCormick agricultural tractors, including models from the CX, MC, and MTX series. This essential component ensures a secure seal for fluid reservoirs, preventing leaks and contamination while maintaining system integrity. Weighing 0.12 kg, this durable filler cap is engineered to meet McCormick's stringent quality standards for reliable performance and a precise fit.