Check the listing for details. Curt Replacement Marine Trailer Jack Mounting Bars Mounting Hardware. Color: Silver, Condition: New, Made in China. Listed at 31.99 USD. MUST READ FITMENT NOTE: || Description: Compatible with CURT marine jacks Bolt-through mounting for secure attachment Includes two mounting bars and four bolts In our goal of being your best source for all things towing, the CURT line of trailer jacks is designed with care and manufactured with pride. CURT jacks are made with quality to promote the life and function of your trailer, and they come in several different styles to accommodate your needs, whether you are a frequenter of the boat landing, the campground, the racetrack or the farm. These replacement bolt-through jack mounting bars are intended to fit a CURT marine jack. The kit includes two mounting brackets with multiple holes, four bolts and four nuts. .