The VEVOR Adjustable Floor Jack Post is a versatile tool for lifting and leveling floors with a height range of 19"-36". With a base/top plate size of 4 x 6 inches and a maximum load capacity of 18000 lbs, this jack is sturdy and reliable for various projects in workshops or at home. The adjustable size and durable construction make it a must-have for those needing to lift and support heavy loads safely and efficiently.