A 4-axle lowboy trailer is a heavy-duty trailer designed to transport oversized and heavy equipment and machinery. It typically features a low bed height compared to other trailers, allowing for easy loading and unloading of tall equipment. The trailer has four axles to distribute the weight of the load evenly and provide stability during transportation. The design of the lowboy trailer helps in transporting tall equipment efficiently while maintaining a lower center of gravity for better overall stability on the road. The trailer is commonly used in construction, agriculture, and other industries that require hauling large and heavy equipment.