?ibroprat ibroprat trailer axle shackle kit, tandem axle trailer kit for double eye leaf spring 3,500 lbs-7,200 lbs axles (7 nuts and 7 bolts) is up for auction in Automotive. The current bid is $1.00, 96% below the $23.35 MSRP, in New/Like New condition. Bid on this item at our Amelia - Ohio Pike location before the auction closes.