Detach to be two bags for convenient use,wide mouth for easy adding sand, beans or buckwheat and then wrap it around any patio umbrella pole with fastener tape, no more tipping on windy days again. Feature: Water-resistant 900D oxford fabric with PU coated for great durability and water resistance. Wide mouth for easy and quick filling with sand, beans or buckwheat and fastener taps cover for easy leakless closure. Position each half of the base around the pole and connect each half with fastener tape system. Great patio umbrella weight bag, no more tipping on windy days and enjoy your peace noon with it. Specification: Material: 900D Oxford fabric Style: Square / Round (optional) Size: Round: 46 * 15cm / 18.1 * 5.9in Square: 46* 46* 10cm / 18 * 18 * 3.9in Central hole dia.: 8cm / 3.1in Weight: 317-410g / 11.1-14.4oz Package weight: 329-425g / 15oz Package List: 1 * Weight Base Bag