Available for I/O and Outboard transoms. Outboard model features one stainless wrap around rail and one underside support rail, reversed (not pictured). I/O model features two stainless steel wrap around rails (pictured). Platform is high density white polyethylene. One fold-down step 13" L x 14.5"W. Stainless steel hardware. Specifications: 1" diameter stainless steel. 18" W x 15.5" D x 1.5" thick. Rail height above platform: 12.5".