This Akron adjustable jack post (Model #JC2) is a heavy-duty structural support post with an impressive 18,000 lb maximum weight capacity. It adjusts in height from 34" to 55" to accommodate varying floor-to-beam distances. The base plate measures 5"W x 4"L x 0.09" thick. Constructed of sturdy steel, it is designed for use in basements and crawl spaces to support beams, girders, and floor joists. Item is in like-new condition with no visible damage. Contents included not specified — inspect prior to purchase.