AFI Poly Swim Platform with Step - good Condition - the mounting holes for platform are 13 34 center to center - the up arm is 11 34 center to center and the down arm is 10 14 center to center. The platform measures 17 12W x 15D x 34 thick and the step is 14W x 15L. The platform shows some wear but has been properly primed and painted and looks good. The brackets can be reversed so this platform could be used on either side of the transom. $75If the ad is up - the item is available