D-type rubber fenders (vertical mounting hole slope type) use compressed air as a buffer medium, which makes the ship have a softer collision avoidance effect when it comes to the side. And it has the advantages of large absorption of impact energy, low pressure per unit area acting on the ship, excellent impact fatigue resistance, and easy installation. Widely used in ports, offshore, oil platforms and ship-to-ship operations. The hole is inclined and the installation direction is vertical