Features 1. The patio umbrella base accessory set is made of high-quality material, durable and not easy to break, can be applied for a long time, and bring you a nice using experience. 2. There are accessory sets in different sizes and combinations, which can meet most of the umbrella pole diameter needs, matching the size will be excellent tightening umbrella pole. 3. Effectively reduce the wind caused by the umbrella shaking; Also can protect your umbrella to avoid friction on the umbrella pole scratches and dents. 4. You can choose 2 sizes of umbrella hole covers according to your different diameter umbrella pole, put them together tightly to keep the umbrella stable; Then tighten the M8 knob thread after installation, and adjust the knob to avoid the umbrella from slipping. 5. These umbrella replacement parts are practical and classic tools, which can be installed in most umbrellas for more options in outdoor spaces, such as beaches, backyards, balconies, poolside and more, bringing much convenience for you. Specification Material: Aluminium, PVC Color: Black Size: Pipe Sleeve 3.8cm, 4.8cm, 3.2cm Weight: 100g, 200g, 170g Package Include: 2 3.8cm Pipe Sleeve + 2 4.8cm Pipe Sleeve + 2 Tightened Knob or 4 3.8cm Pipe Sleeve + 4 4.8cm Pipe Sleeve + 4 Tightened Knob or 2 3.2cm Pipe Sleeve + 2 3.8cm Pipe Sleeve + 2 4.8cm Pipe Sleeve + 4 Tightened Knob + 2 Diagonal Sleeve