Trickstep: detachable 3 and 4-step models are made of mild steel square tubing, TIG welded for solid integrity, and coated with Marine industry Tuff coat (black). Includes handrail, non-skid step pads, and all hardware for mounting.Series Breakdown:Z Series:Z20 . Z22 5 Series:519DVX . 519SVX . 520DVX . 520SVX . 521DVX . 521SVX V Series (4 Step Model):Reata . VS619 6 Series (4 Step Model):618T . 619DVS . 619SVS . 620DVS . 620SVS . 620T . 621DVS . 621SVS Disclaimer: RANGER® is a trademark of White River Marine Group, LLC. This product is not produced by, sponsored by, or otherwise affiliated with White River Marine Group, LLC.