The standard material thickness of Waterbowl is 4mm. Coated steel with colour DB703 is a weatherproof metal alloy. This product will arrive to you finished in a powder coat colour provided in description. All water bowls have 1 x drainage hole in the middle. If you order a water bowl, there will be a plug included to close the hole. If you order a fire bowl, there will be no plug included. Very strong and wear-resistant Weatherproof and durable material Warranty 5 years from manufacturer Made in Europe.