This is a roof for your wooden pagoda. Unlike the Wooden Pagoda Wall, this is solid, so it's safe to stand on.
Wooden Pagoda Roof price in Growtopia: sells for about 25 WL (median of 1 offers from community Discords, past 30 days). Live price chart and the latest buy and sell offers.
Recently sold at: UIXL, VEVUV