Constructed from marine grade aluminum 1 1/4" I.D.pipe made from marine grade aluminum 6063 T-5 to resist corrosion Extruded aluminum channels are serrated to produce a non-skid surface rung with no sharp edges Use as either a dock or seawall ladder Standard ladder sizes are: 3,4,5,6 & 7 step models - large inventories maintained Custom lengths available Rated for 665 lbs. per rung