The McCormick 6517205M91 Filler Cap is a genuine OEM replacement part designed for various McCormick agricultural tractors, including models from the CX, MC, MTX, XTX, X6, and X7 series. This essential component ensures proper sealing of fluid reservoirs, preventing contamination and leaks. With approximate dimensions of 95mm length, 51mm width, and 51mm height, and a weight of 0.05 kg, this filler cap is built to McCormick's original specifications for reliable performance and a perfect fit.