The MTD 63105195A is a genuine OEM mulching cap, also known as a mulching plug, designed for select Cub Cadet zero-turn mowers. This essential component helps convert your mower deck for mulching operations, finely cutting grass clippings and returning them to the lawn as natural fertilizer. It ensures proper deck functionality and efficient mulching performance. Confirmed fitment includes Cub Cadet RZT-S42, RZT-S46, RZT-SX42, and RZT-SX46 models.