The replacement parts of the umbrella stand are mainly made of plastic, reliable and reusable, strong and safe, with high temperature and weather resistance. The screw knob is made of high quality black plastic and stainless steel, which is not easy to break or rust. The cap meets most of the diameter requirements of the umbrella pole,and the matching size will be excellent for tightening the umbrella pole. Effectively reduce the umbrella swaying wind. It also protects your umbrella from scratches and dents on the shaft. You can choose 2 sizes of hole covers according to the different diameter of your umbrella,and put them tightly together to keep the umbrella stable. After installation, tighten M8 40mm thread and adjust the knob to avoid umbrella slipping. These umbrella replacement parts are practical and classic tools that can be installed in most umbrellas to provide more options for outdoor spaces such as beaches, backyards, balconies, and poolsides. Specifications: ColorBlack Material: Plastic Size: As pictures show Package Contents: 1pcs 38mm Cover Cap 1pcs 48mm Cover Cap 1pcs screw knob Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.