General description Replacement for Umbrella Holder, Hole Cover Cap with Stainless Steel Star Knob m8 is an essential accessory for stabilizing and aligning patio umbrella legs. This set includes 12 pieces of umbrella replacement parts, making it ideal for various outdoor settings such as patios, balconies, and backyards. Technical specifications Includes: 12pcs umbrella replacement parts Sizes of umbrella grommets: 1.9 cm, 1.5 cm, and 1.3 cm inner diameter (ID) 4pcs M8 screws (40mm/1.57 inches) 2pcs handle screws Outer ring sizes: 4.8 cm, 3.8 cm, and 3.3 cm Installation Select the appropriate size of umbrella rings based on the diameter of the umbrella pole. Insert the umbrella pole into the base. Tighten the M8 star handle to secure the umbrella and prevent slipping. Usage Compatible with most standard pole diameters. Suitable for use with patio tables, beaches, patios, backyard gardens, balconies, and swimming pools. Other information Made of high-quality plastic and stainless