General description Product includes 12 umbrella replacement parts, consisting of 2 sets (6pcs) of umbrella hole rings in 3 sizes: 4.8cm, 3.8cm, and 3.3cm inner diameter (can be assembled), 4pcs M8 40mm star clamps, and 2pcs umbrella support tubes. These parts are ideal for stabilizing and aligning garden umbrella bases. Technical specifications Umbrella hole ring sizes: 4.8cm, 3.8cm, and 3.3cm inner diameter M8 star clamps: 40mm Material: High-quality plastic and stainless steel Installation Choose the appropriate size of umbrella ring based on the diameter of your umbrella pole. Insert the umbrella pole into the base. Tighten the M8 star knob to secure the umbrella and prevent slipping. Usage Suitable for use on patio tables, beaches, gardens, balconies, terraces, and poolside. Classic black color complements all outdoor furniture.