The pontoon boat bumper clip is designed to help you easily and quickly adjust the position of your fenders to suit a variety of docking scenarios, and when you need to retract your fenders, simply remove bumper hanger. The pontoon clips are designed to clamp on 1inch and 1-1/4inch square tube rails securely, The diameter of the rope passing through the hole must not exceed 3/8inch. The pontoon hanger easily slides along the bumper to quickly reposition the pontoon bumper where you need it. It is easier to pass the rope through the hole from top to bottom, and then knot the rope at the upper end to complete the rope preparation. Made of Nylon, Excellent seawater resistance and . Colour:Black Material:nylon Package Contents: 8x Boat Bumper Clips Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.