Dan FenderStep Fender 1513 is the original step-on boarding fender that provides the simple double function of being both a boarding step but also a practical fender. Features Handy for alighting from a tender, while at the same time acting as a fender Manufactured in strong marine grade PVC with integrally moulded solid rope holds Fitted with high grade metal valves with protective dirt/salt screw caps Every Fender2step is immersion tested prior to despatch, to ensure that each one is leak free and air-tight Easily Setup  How to use  Separately tie two minimum diameter 10mm (3/8") ropes using a carefully formed bowline knot to each rope hold. Securely tie the other end of each rope to suitable strongpoints on the boat. Ensure the step is level and that all the knots are fully secure prior to every use. Specifications Length 40cm Width 40cm Depth 18cm Hole Dia. 18mm