Standard features: - 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 (see our engineer's report below)