Keep your lightweight and pop-up tents and gazebos securely grounded with the Outsunny Weight Sand Fillable Set. Crafted from durable and heavy-duty plastic, these disc-shaped pieces can be conveniently filled with sand, allowing for easy transportation. When filled with sand, each weight weighs 4kg, while filling them with cement increases the weight to 5kg. This set provides an effective solution to keep your shelter stable during rainy and windy conditions. It is specifically designed to fit square canopy poles ranging from 20 x 20mm to 40 x 40mm. Additionally, these weights are fillable, making them a convenient option for on-the-go use.