Amalfi planters are designed for both indoor and outdoor use. They are available in various materials, including Fiber-Reinforced Polymer (FRP) and Glass Reinforced Concrete (GRC). 

Material Descriptions: 
Fiber-Reinforced Polymer (FRP):
FRP planters are known for being lightweight, strong, and corrosion-resistant. They typically do not come with drainage holes unless specifically requested.
Glass Reinforced Concrete (GRC):
GRC planters are heavier than FRP planters but offer similar benefits of strength and corrosion resistance. They usually include one drainage hole, which can be covered upon request