The STIHL 664531048 mulching blade is an authentic OEM component designed for optimal cutting and mulching performance on specific STIHL RM 2 RT series lawn mowers. This high-quality steel blade is engineered to finely cut grass clippings, returning essential nutrients to the lawn for a healthier turf. Measuring 533.4 mm in length and weighing approximately 0.68 kg, it provides a precise fit and superior durability for models including RM 2 RT 5097 Z, RM 2 RT 5097, RM 2 RT 5112 Z, and RM 2 RT 5112.