... diameter,1.5mm thick Aluminum tube,4 steps. Aluminum RV Bunk Ladder, 60" ,25mm diameter,1.5mm thick Aluminum tube,4 steps. These ... motor home, travel trailer or RV bunk ladder is made from aluminum alloy and supports up to 600 pounds.The ... bunk ladder steps are padded (padding is removable) ... 'Docking System', or 1" hook. trailer bunk ladder