This is a wood material made from an artificially antique finish on the surface of Australian Cypress wood that is popular in our shop. The antique finish is only on one side of the 4.5 inches (115 mm) face. Please note that there may be variations in the strength and weakness of this process. Australian Cypress is also known as Australian Hinoki, and is made of hardwood, but it is lighter and easier to handle than Amazon Jara and Serangamba two. Durability is twice as durable as western red cedar, and is basically not required for preservation, insect repellency or painting. It is also known as a wood that is resistant to white dogs, and it is often used in Australia as a base for luxury homes. It also has a smooth wood skin and a unique scent of cypress, so you can enjoy a comfortable deck life. The material is also characteristic of the material that grades from red to white silver. The speed of white-silver coloring varies depending on the amount it receives UV rays. Please understand that this is a unique feature and interesting unique to solid wood. Furthermore, since it is made of hard wood with high density material, you will need to drill holes in advance when tightening screws. This product is very fluid in stock. If you need it urgently, please contact our store for the number of pieces you plan to purchase. We will check the inventory in the store. This product will be shipped from the manufacturer, so "cash on delivery" cannot be used.