Strong and sturdy, these replacement tops provide dependable support for boats stored on land.Flat, replacement top for use with Brownell jack stands. Plywood pad with acme thread jack screw. G-TOP is 23"W x 23"L. It has a hot dip galvanized finish for extra protection from the elements.Key FeaturesUse as replacements for worn topsSupport and stabilize your boat on land with flat replacement topsNest for compact storageUse to change the configuration of your existing standsHot dip galvanized finish for extra protectionAcme-threaded adjustable rodUse to fabricate your own trailers or cradles